Home / 810,005.10-1,215,007.65-778,901.10

Finding the Fourth Proportional to 810,005.10, 1,215,007.65 and 778,901.10

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Solution

The fourth proportional to 810,005.10, 1,215,007.65 and 778,901.10 is: 1,168,351.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,005.10 : 1,215,007.65 = 778,901.10 : x
  2. Step 2: Convert to fraction form
    810,005.10/1,215,007.65 = 778,901.10/x
  3. Step 3: Cross multiply
    810,005.10x = 1,215,007.65 × 778,901.10
  4. Step 4: Simplify right side
    810,005.10x = 946,370,795,093.42
  5. Step 5: Solve for x
    x = 946,370,795,093.42/810,005.10
  6. Step 6: Final answer
    x = 1,168,351.65

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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.