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Finding the Fourth Proportional to 627,468.86, 865,904.65 and 355,588.52

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Solution

The fourth proportional to 627,468.86, 865,904.65 and 355,588.52 is: 490,710.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,468.86 : 865,904.65 = 355,588.52 : x
  2. Step 2: Convert to fraction form
    627,468.86/865,904.65 = 355,588.52/x
  3. Step 3: Cross multiply
    627,468.86x = 865,904.65 × 355,588.52
  4. Step 4: Simplify right side
    627,468.86x = 307,905,747,736.12
  5. Step 5: Solve for x
    x = 307,905,747,736.12/627,468.86
  6. Step 6: Final answer
    x = 490,710.80

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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.