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Finding the Fourth Proportional to 680,040, 938,455.20 and 378,227.52

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Solution

The fourth proportional to 680,040, 938,455.20 and 378,227.52 is: 521,953.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,040 : 938,455.20 = 378,227.52 : x
  2. Step 2: Convert to fraction form
    680,040/938,455.20 = 378,227.52/x
  3. Step 3: Cross multiply
    680,040x = 938,455.20 × 378,227.52
  4. Step 4: Simplify right side
    680,040x = 354,949,582,927.10
  5. Step 5: Solve for x
    x = 354,949,582,927.10/680,040
  6. Step 6: Final answer
    x = 521,953.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.