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Finding the Fourth Proportional to 658,134.40, 987,201.60 and 429,811.60

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Solution

The fourth proportional to 658,134.40, 987,201.60 and 429,811.60 is: 644,717.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,134.40 : 987,201.60 = 429,811.60 : x
  2. Step 2: Convert to fraction form
    658,134.40/987,201.60 = 429,811.60/x
  3. Step 3: Cross multiply
    658,134.40x = 987,201.60 × 429,811.60
  4. Step 4: Simplify right side
    658,134.40x = 424,310,699,218.56
  5. Step 5: Solve for x
    x = 424,310,699,218.56/658,134.40
  6. Step 6: Final answer
    x = 644,717.40

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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.