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Finding the Fourth Proportional to 483,507.13, 725,259.90 and 128,521.16

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Solution

The fourth proportional to 483,507.13, 725,259.90 and 128,521.16 is: 192,781.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,507.13 : 725,259.90 = 128,521.16 : x
  2. Step 2: Convert to fraction form
    483,507.13/725,259.90 = 128,521.16/x
  3. Step 3: Cross multiply
    483,507.13x = 725,259.90 × 128,521.16
  4. Step 4: Simplify right side
    483,507.13x = 93,211,239,380.58
  5. Step 5: Solve for x
    x = 93,211,239,380.58/483,507.13
  6. Step 6: Final answer
    x = 192,781.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.