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Finding the Fourth Proportional to 658,278.40, 987,187.20 and 342,630.40

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Solution

The fourth proportional to 658,278.40, 987,187.20 and 342,630.40 is: 513,825.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,278.40 : 987,187.20 = 342,630.40 : x
  2. Step 2: Convert to fraction form
    658,278.40/987,187.20 = 342,630.40/x
  3. Step 3: Cross multiply
    658,278.40x = 987,187.20 × 342,630.40
  4. Step 4: Simplify right side
    658,278.40x = 338,240,345,210.88
  5. Step 5: Solve for x
    x = 338,240,345,210.88/658,278.40
  6. Step 6: Final answer
    x = 513,825.68

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1.5x scale

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.