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Finding the Fourth Proportional to 372,686.80, 559,030.20 and 343,818.40

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Solution

The fourth proportional to 372,686.80, 559,030.20 and 343,818.40 is: 515,727.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,686.80 : 559,030.20 = 343,818.40 : x
  2. Step 2: Convert to fraction form
    372,686.80/559,030.20 = 343,818.40/x
  3. Step 3: Cross multiply
    372,686.80x = 559,030.20 × 343,818.40
  4. Step 4: Simplify right side
    372,686.80x = 192,204,868,915.68
  5. Step 5: Solve for x
    x = 192,204,868,915.68/372,686.80
  6. Step 6: Final answer
    x = 515,727.60

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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.