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Finding the Fourth Proportional to 636,785.88, 878,684.46 and 430,502.85

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Solution

The fourth proportional to 636,785.88, 878,684.46 and 430,502.85 is: 594,039.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,785.88 : 878,684.46 = 430,502.85 : x
  2. Step 2: Convert to fraction form
    636,785.88/878,684.46 = 430,502.85/x
  3. Step 3: Cross multiply
    636,785.88x = 878,684.46 × 430,502.85
  4. Step 4: Simplify right side
    636,785.88x = 378,276,164,280.71
  5. Step 5: Solve for x
    x = 378,276,164,280.71/636,785.88
  6. Step 6: Final answer
    x = 594,039.81

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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.