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Finding the Fourth Proportional to 372,728.89, 514,387.51 and 280,683.39

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Solution

The fourth proportional to 372,728.89, 514,387.51 and 280,683.39 is: 387,359.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,728.89 : 514,387.51 = 280,683.39 : x
  2. Step 2: Convert to fraction form
    372,728.89/514,387.51 = 280,683.39/x
  3. Step 3: Cross multiply
    372,728.89x = 514,387.51 × 280,683.39
  4. Step 4: Simplify right side
    372,728.89x = 144,380,030,080.46
  5. Step 5: Solve for x
    x = 144,380,030,080.46/372,728.89
  6. Step 6: Final answer
    x = 387,359.38

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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.