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Finding the Fourth Proportional to 636,307.59, 878,238.28 and 403,583.86

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Solution

The fourth proportional to 636,307.59, 878,238.28 and 403,583.86 is: 557,030.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,307.59 : 878,238.28 = 403,583.86 : x
  2. Step 2: Convert to fraction form
    636,307.59/878,238.28 = 403,583.86/x
  3. Step 3: Cross multiply
    636,307.59x = 878,238.28 × 403,583.86
  4. Step 4: Simplify right side
    636,307.59x = 354,442,796,644.44
  5. Step 5: Solve for x
    x = 354,442,796,644.44/636,307.59
  6. Step 6: Final answer
    x = 557,030.59

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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.