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Finding the Fourth Proportional to 636,785.55, 878,745.68 and 350,305.71

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Solution

The fourth proportional to 636,785.55, 878,745.68 and 350,305.71 is: 483,411.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,785.55 : 878,745.68 = 350,305.71 : x
  2. Step 2: Convert to fraction form
    636,785.55/878,745.68 = 350,305.71/x
  3. Step 3: Cross multiply
    636,785.55x = 878,745.68 × 350,305.71
  4. Step 4: Simplify right side
    636,785.55x = 307,829,627,590.30
  5. Step 5: Solve for x
    x = 307,829,627,590.30/636,785.55
  6. Step 6: Final answer
    x = 483,411.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.