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Finding the Fourth Proportional to 388,574.01, 582,863.75 and 135,853.40

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Solution

The fourth proportional to 388,574.01, 582,863.75 and 135,853.40 is: 203,781.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,574.01 : 582,863.75 = 135,853.40 : x
  2. Step 2: Convert to fraction form
    388,574.01/582,863.75 = 135,853.40/x
  3. Step 3: Cross multiply
    388,574.01x = 582,863.75 × 135,853.40
  4. Step 4: Simplify right side
    388,574.01x = 79,184,023,461.59
  5. Step 5: Solve for x
    x = 79,184,023,461.59/388,574.01
  6. Step 6: Final answer
    x = 203,781.06

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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.