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Finding the Fourth Proportional to 659,871.30, 989,839.35 and 344,943.30

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Solution

The fourth proportional to 659,871.30, 989,839.35 and 344,943.30 is: 517,431.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,871.30 : 989,839.35 = 344,943.30 : x
  2. Step 2: Convert to fraction form
    659,871.30/989,839.35 = 344,943.30/x
  3. Step 3: Cross multiply
    659,871.30x = 989,839.35 × 344,943.30
  4. Step 4: Simplify right side
    659,871.30x = 341,438,451,858.86
  5. Step 5: Solve for x
    x = 341,438,451,858.86/659,871.30
  6. Step 6: Final answer
    x = 517,431.89

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Double scale
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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.