Home / 810,006.60-1,215,009.90-509,512.80

Finding the Fourth Proportional to 810,006.60, 1,215,009.90 and 509,512.80

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Solution

The fourth proportional to 810,006.60, 1,215,009.90 and 509,512.80 is: 764,269.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,006.60 : 1,215,009.90 = 509,512.80 : x
  2. Step 2: Convert to fraction form
    810,006.60/1,215,009.90 = 509,512.80/x
  3. Step 3: Cross multiply
    810,006.60x = 1,215,009.90 × 509,512.80
  4. Step 4: Simplify right side
    810,006.60x = 619,063,096,176.72
  5. Step 5: Solve for x
    x = 619,063,096,176.72/810,006.60
  6. Step 6: Final answer
    x = 764,269.20

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Double scale
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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.