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Finding the Fourth Proportional to 388,407.98, 582,752.28 and 135,725.78

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Solution

The fourth proportional to 388,407.98, 582,752.28 and 135,725.78 is: 203,637.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,407.98 : 582,752.28 = 135,725.78 : x
  2. Step 2: Convert to fraction form
    388,407.98/582,752.28 = 135,725.78/x
  3. Step 3: Cross multiply
    388,407.98x = 582,752.28 × 135,725.78
  4. Step 4: Simplify right side
    388,407.98x = 79,094,507,749.78
  5. Step 5: Solve for x
    x = 79,094,507,749.78/388,407.98
  6. Step 6: Final answer
    x = 203,637.70

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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.