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Finding the Fourth Proportional to 407,644.40, 611,466.60 and 256,085.30

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Solution

The fourth proportional to 407,644.40, 611,466.60 and 256,085.30 is: 384,127.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,644.40 : 611,466.60 = 256,085.30 : x
  2. Step 2: Convert to fraction form
    407,644.40/611,466.60 = 256,085.30/x
  3. Step 3: Cross multiply
    407,644.40x = 611,466.60 × 256,085.30
  4. Step 4: Simplify right side
    407,644.40x = 156,587,607,700.98
  5. Step 5: Solve for x
    x = 156,587,607,700.98/407,644.40
  6. Step 6: Final answer
    x = 384,127.95

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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.