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Finding the Fourth Proportional to 658,331.80, 987,530.10 and 343,403.80

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Solution

The fourth proportional to 658,331.80, 987,530.10 and 343,403.80 is: 515,122.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,331.80 : 987,530.10 = 343,403.80 : x
  2. Step 2: Convert to fraction form
    658,331.80/987,530.10 = 343,403.80/x
  3. Step 3: Cross multiply
    658,331.80x = 987,530.10 × 343,403.80
  4. Step 4: Simplify right side
    658,331.80x = 339,121,588,954.38
  5. Step 5: Solve for x
    x = 339,121,588,954.38/658,331.80
  6. Step 6: Final answer
    x = 515,122.60

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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.