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Finding the Fourth Proportional to 391,567.90, 586,039.65 and 344,328.70

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Solution

The fourth proportional to 391,567.90, 586,039.65 and 344,328.70 is: 515,339.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,567.90 : 586,039.65 = 344,328.70 : x
  2. Step 2: Convert to fraction form
    391,567.90/586,039.65 = 344,328.70/x
  3. Step 3: Cross multiply
    391,567.90x = 586,039.65 × 344,328.70
  4. Step 4: Simplify right side
    391,567.90x = 201,790,270,832.96
  5. Step 5: Solve for x
    x = 201,790,270,832.96/391,567.90
  6. Step 6: Final answer
    x = 515,339.16

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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.