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Finding the Fourth Proportional to 627,160.55, 865,602.86 and 408,990.51

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Solution

The fourth proportional to 627,160.55, 865,602.86 and 408,990.51 is: 564,486.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,160.55 : 865,602.86 = 408,990.51 : x
  2. Step 2: Convert to fraction form
    627,160.55/865,602.86 = 408,990.51/x
  3. Step 3: Cross multiply
    627,160.55x = 865,602.86 × 408,990.51
  4. Step 4: Simplify right side
    627,160.55x = 354,023,353,123.91
  5. Step 5: Solve for x
    x = 354,023,353,123.91/627,160.55
  6. Step 6: Final answer
    x = 564,486.01

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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.