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Finding the Fourth Proportional to 615,587.40, 921,825.90 and 404,080.20

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Solution

The fourth proportional to 615,587.40, 921,825.90 and 404,080.20 is: 605,099.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,587.40 : 921,825.90 = 404,080.20 : x
  2. Step 2: Convert to fraction form
    615,587.40/921,825.90 = 404,080.20/x
  3. Step 3: Cross multiply
    615,587.40x = 921,825.90 × 404,080.20
  4. Step 4: Simplify right side
    615,587.40x = 372,491,594,037.18
  5. Step 5: Solve for x
    x = 372,491,594,037.18/615,587.40
  6. Step 6: Final answer
    x = 605,099.44

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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.