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Finding the Fourth Proportional to 486,972.39, 672,009 and 272,114.22

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Solution

The fourth proportional to 486,972.39, 672,009 and 272,114.22 is: 375,510.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,972.39 : 672,009 = 272,114.22 : x
  2. Step 2: Convert to fraction form
    486,972.39/672,009 = 272,114.22/x
  3. Step 3: Cross multiply
    486,972.39x = 672,009 × 272,114.22
  4. Step 4: Simplify right side
    486,972.39x = 182,863,202,347.95
  5. Step 5: Solve for x
    x = 182,863,202,347.95/486,972.39
  6. Step 6: Final answer
    x = 375,510.41

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1.5x scale

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.