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Finding the Fourth Proportional to 674,760.06, 931,169.82 and 388,274.40

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Solution

The fourth proportional to 674,760.06, 931,169.82 and 388,274.40 is: 535,819.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,760.06 : 931,169.82 = 388,274.40 : x
  2. Step 2: Convert to fraction form
    674,760.06/931,169.82 = 388,274.40/x
  3. Step 3: Cross multiply
    674,760.06x = 931,169.82 × 388,274.40
  4. Step 4: Simplify right side
    674,760.06x = 361,549,403,158.61
  5. Step 5: Solve for x
    x = 361,549,403,158.61/674,760.06
  6. Step 6: Final answer
    x = 535,819.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.