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Finding the Fourth Proportional to 391,323.70, 587,698.35 and 342,334.90

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Solution

The fourth proportional to 391,323.70, 587,698.35 and 342,334.90 is: 514,125.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,323.70 : 587,698.35 = 342,334.90 : x
  2. Step 2: Convert to fraction form
    391,323.70/587,698.35 = 342,334.90/x
  3. Step 3: Cross multiply
    391,323.70x = 587,698.35 × 342,334.90
  4. Step 4: Simplify right side
    391,323.70x = 201,189,655,877.42
  5. Step 5: Solve for x
    x = 201,189,655,877.42/391,323.70
  6. Step 6: Final answer
    x = 514,125.92

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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.