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Finding the Fourth Proportional to 658,411.40, 987,617.10 and 658,411.40

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Solution

The fourth proportional to 658,411.40, 987,617.10 and 658,411.40 is: 987,617.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,411.40 : 987,617.10 = 658,411.40 : x
  2. Step 2: Convert to fraction form
    658,411.40/987,617.10 = 658,411.40/x
  3. Step 3: Cross multiply
    658,411.40x = 987,617.10 × 658,411.40
  4. Step 4: Simplify right side
    658,411.40x = 650,258,357,474.94
  5. Step 5: Solve for x
    x = 650,258,357,474.94/658,411.40
  6. Step 6: Final answer
    x = 987,617.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.