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Finding the Fourth Proportional to 638,429.10, 957,643.65 and 535,785.90

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Solution

The fourth proportional to 638,429.10, 957,643.65 and 535,785.90 is: 803,678.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,429.10 : 957,643.65 = 535,785.90 : x
  2. Step 2: Convert to fraction form
    638,429.10/957,643.65 = 535,785.90/x
  3. Step 3: Cross multiply
    638,429.10x = 957,643.65 × 535,785.90
  4. Step 4: Simplify right side
    638,429.10x = 513,091,964,894.54
  5. Step 5: Solve for x
    x = 513,091,964,894.54/638,429.10
  6. Step 6: Final answer
    x = 803,678.85

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Similar ratio
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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.