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Finding the Fourth Proportional to 391,566.90, 586,038.15 and 344,327.70

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Solution

The fourth proportional to 391,566.90, 586,038.15 and 344,327.70 is: 515,337.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,566.90 : 586,038.15 = 344,327.70 : x
  2. Step 2: Convert to fraction form
    391,566.90/586,038.15 = 344,327.70/x
  3. Step 3: Cross multiply
    391,566.90x = 586,038.15 × 344,327.70
  4. Step 4: Simplify right side
    391,566.90x = 201,789,168,301.76
  5. Step 5: Solve for x
    x = 201,789,168,301.76/391,566.90
  6. Step 6: Final answer
    x = 515,337.66

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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.