Home / 810,006.10-1,215,009.15-509,512.30

Finding the Fourth Proportional to 810,006.10, 1,215,009.15 and 509,512.30

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Solution

The fourth proportional to 810,006.10, 1,215,009.15 and 509,512.30 is: 764,268.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,006.10 : 1,215,009.15 = 509,512.30 : x
  2. Step 2: Convert to fraction form
    810,006.10/1,215,009.15 = 509,512.30/x
  3. Step 3: Cross multiply
    810,006.10x = 1,215,009.15 × 509,512.30
  4. Step 4: Simplify right side
    810,006.10x = 619,062,106,537.55
  5. Step 5: Solve for x
    x = 619,062,106,537.55/810,006.10
  6. Step 6: Final answer
    x = 764,268.45

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Half scale
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Double scale
Find fourth proportional to 810,007.10, 1,215,010.65 and 509,513.30
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.