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Finding the Fourth Proportional to 627,431.28, 865,888.35 and 355,551.90

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Solution

The fourth proportional to 627,431.28, 865,888.35 and 355,551.90 is: 490,680.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,431.28 : 865,888.35 = 355,551.90 : x
  2. Step 2: Convert to fraction form
    627,431.28/865,888.35 = 355,551.90/x
  3. Step 3: Cross multiply
    627,431.28x = 865,888.35 × 355,551.90
  4. Step 4: Simplify right side
    627,431.28x = 307,868,248,030.37
  5. Step 5: Solve for x
    x = 307,868,248,030.37/627,431.28
  6. Step 6: Final answer
    x = 490,680.43

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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.