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Finding the Fourth Proportional to 486,978.74, 672,029.18 and 272,119.02

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Solution

The fourth proportional to 486,978.74, 672,029.18 and 272,119.02 is: 375,523.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,978.74 : 672,029.18 = 272,119.02 : x
  2. Step 2: Convert to fraction form
    486,978.74/672,029.18 = 272,119.02/x
  3. Step 3: Cross multiply
    486,978.74x = 672,029.18 × 272,119.02
  4. Step 4: Simplify right side
    486,978.74x = 182,871,921,873.00
  5. Step 5: Solve for x
    x = 182,871,921,873.00/486,978.74
  6. Step 6: Final answer
    x = 375,523.42

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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.