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Finding the Fourth Proportional to 385,356.20, 578,135.10 and 148,706.60

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Solution

The fourth proportional to 385,356.20, 578,135.10 and 148,706.60 is: 223,098.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,356.20 : 578,135.10 = 148,706.60 : x
  2. Step 2: Convert to fraction form
    385,356.20/578,135.10 = 148,706.60/x
  3. Step 3: Cross multiply
    385,356.20x = 578,135.10 × 148,706.60
  4. Step 4: Simplify right side
    385,356.20x = 85,972,505,061.66
  5. Step 5: Solve for x
    x = 85,972,505,061.66/385,356.20
  6. Step 6: Final answer
    x = 223,098.80

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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.