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Finding the Fourth Proportional to 385,158.78, 577,621.53 and 104,639.58

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Solution

The fourth proportional to 385,158.78, 577,621.53 and 104,639.58 is: 156,927.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,158.78 : 577,621.53 = 104,639.58 : x
  2. Step 2: Convert to fraction form
    385,158.78/577,621.53 = 104,639.58/x
  3. Step 3: Cross multiply
    385,158.78x = 577,621.53 × 104,639.58
  4. Step 4: Simplify right side
    385,158.78x = 60,442,074,298.16
  5. Step 5: Solve for x
    x = 60,442,074,298.16/385,158.78
  6. Step 6: Final answer
    x = 156,927.68

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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.