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Finding the Fourth Proportional to 385,439.90, 578,118.29 and 101,158.94

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Solution

The fourth proportional to 385,439.90, 578,118.29 and 101,158.94 is: 151,727.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,439.90 : 578,118.29 = 101,158.94 : x
  2. Step 2: Convert to fraction form
    385,439.90/578,118.29 = 101,158.94/x
  3. Step 3: Cross multiply
    385,439.90x = 578,118.29 × 101,158.94
  4. Step 4: Simplify right side
    385,439.90x = 58,481,835,109.21
  5. Step 5: Solve for x
    x = 58,481,835,109.21/385,439.90
  6. Step 6: Final answer
    x = 151,727.51

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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.