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Finding the Fourth Proportional to 636,931.59, 878,989.80 and 365,051.94

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Solution

The fourth proportional to 636,931.59, 878,989.80 and 365,051.94 is: 503,785.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,931.59 : 878,989.80 = 365,051.94 : x
  2. Step 2: Convert to fraction form
    636,931.59/878,989.80 = 365,051.94/x
  3. Step 3: Cross multiply
    636,931.59x = 878,989.80 × 365,051.94
  4. Step 4: Simplify right side
    636,931.59x = 320,876,931,730.21
  5. Step 5: Solve for x
    x = 320,876,931,730.21/636,931.59
  6. Step 6: Final answer
    x = 503,785.55

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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.