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Finding the Fourth Proportional to 659,865.30, 989,830.35 and 344,937.30

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Solution

The fourth proportional to 659,865.30, 989,830.35 and 344,937.30 is: 517,422.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,865.30 : 989,830.35 = 344,937.30 : x
  2. Step 2: Convert to fraction form
    659,865.30/989,830.35 = 344,937.30/x
  3. Step 3: Cross multiply
    659,865.30x = 989,830.35 × 344,937.30
  4. Step 4: Simplify right side
    659,865.30x = 341,429,408,387.06
  5. Step 5: Solve for x
    x = 341,429,408,387.06/659,865.30
  6. Step 6: Final answer
    x = 517,422.89

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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.