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Finding the Fourth Proportional to 658,138.40, 987,207.60 and 377,424.80

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Solution

The fourth proportional to 658,138.40, 987,207.60 and 377,424.80 is: 566,137.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,138.40 : 987,207.60 = 377,424.80 : x
  2. Step 2: Convert to fraction form
    658,138.40/987,207.60 = 377,424.80/x
  3. Step 3: Cross multiply
    658,138.40x = 987,207.60 × 377,424.80
  4. Step 4: Simplify right side
    658,138.40x = 372,596,630,988.48
  5. Step 5: Solve for x
    x = 372,596,630,988.48/658,138.40
  6. Step 6: Final answer
    x = 566,137.20

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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.