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Finding the Fourth Proportional to 658,266.30, 987,399.45 and 551,978.10

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Solution

The fourth proportional to 658,266.30, 987,399.45 and 551,978.10 is: 827,967.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,266.30 : 987,399.45 = 551,978.10 : x
  2. Step 2: Convert to fraction form
    658,266.30/987,399.45 = 551,978.10/x
  3. Step 3: Cross multiply
    658,266.30x = 987,399.45 × 551,978.10
  4. Step 4: Simplify right side
    658,266.30x = 545,022,872,352.05
  5. Step 5: Solve for x
    x = 545,022,872,352.05/658,266.30
  6. Step 6: Final answer
    x = 827,967.15

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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.