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Finding the Fourth Proportional to 391,112.80, 586,150.80 and 346,530.40

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Solution

The fourth proportional to 391,112.80, 586,150.80 and 346,530.40 is: 519,336.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,112.80 : 586,150.80 = 346,530.40 : x
  2. Step 2: Convert to fraction form
    391,112.80/586,150.80 = 346,530.40/x
  3. Step 3: Cross multiply
    391,112.80x = 586,150.80 × 346,530.40
  4. Step 4: Simplify right side
    391,112.80x = 203,119,071,184.32
  5. Step 5: Solve for x
    x = 203,119,071,184.32/391,112.80
  6. Step 6: Final answer
    x = 519,336.29

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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.