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Finding the Fourth Proportional to 486,978.22, 672,017.06 and 272,120.05

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Solution

The fourth proportional to 486,978.22, 672,017.06 and 272,120.05 is: 375,518.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,978.22 : 672,017.06 = 272,120.05 : x
  2. Step 2: Convert to fraction form
    486,978.22/672,017.06 = 272,120.05/x
  3. Step 3: Cross multiply
    486,978.22x = 672,017.06 × 272,120.05
  4. Step 4: Simplify right side
    486,978.22x = 182,869,316,205.05
  5. Step 5: Solve for x
    x = 182,869,316,205.05/486,978.22
  6. Step 6: Final answer
    x = 375,518.47

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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.