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Finding the Fourth Proportional to 385,124.40, 577,686.60 and 118,861.20

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Solution

The fourth proportional to 385,124.40, 577,686.60 and 118,861.20 is: 178,291.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,124.40 : 577,686.60 = 118,861.20 : x
  2. Step 2: Convert to fraction form
    385,124.40/577,686.60 = 118,861.20/x
  3. Step 3: Cross multiply
    385,124.40x = 577,686.60 × 118,861.20
  4. Step 4: Simplify right side
    385,124.40x = 68,664,522,499.92
  5. Step 5: Solve for x
    x = 68,664,522,499.92/385,124.40
  6. Step 6: Final answer
    x = 178,291.80

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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.