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Finding the Fourth Proportional to 487,099.28, 672,173.70 and 272,237.60

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Solution

The fourth proportional to 487,099.28, 672,173.70 and 272,237.60 is: 375,674.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,099.28 : 672,173.70 = 272,237.60 : x
  2. Step 2: Convert to fraction form
    487,099.28/672,173.70 = 272,237.60/x
  3. Step 3: Cross multiply
    487,099.28x = 672,173.70 × 272,237.60
  4. Step 4: Simplify right side
    487,099.28x = 182,990,954,871.12
  5. Step 5: Solve for x
    x = 182,990,954,871.12/487,099.28
  6. Step 6: Final answer
    x = 375,674.86

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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.