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Finding the Fourth Proportional to 391,541.40, 585,999.90 and 344,302.20

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Solution

The fourth proportional to 391,541.40, 585,999.90 and 344,302.20 is: 515,299.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,541.40 : 585,999.90 = 344,302.20 : x
  2. Step 2: Convert to fraction form
    391,541.40/585,999.90 = 344,302.20/x
  3. Step 3: Cross multiply
    391,541.40x = 585,999.90 × 344,302.20
  4. Step 4: Simplify right side
    391,541.40x = 201,761,054,769.78
  5. Step 5: Solve for x
    x = 201,761,054,769.78/391,541.40
  6. Step 6: Final answer
    x = 515,299.42

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1.5x scale

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.