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Finding the Fourth Proportional to 410,823.40, 615,543.90 and 385,940.20

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Solution

The fourth proportional to 410,823.40, 615,543.90 and 385,940.20 is: 578,260.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,823.40 : 615,543.90 = 385,940.20 : x
  2. Step 2: Convert to fraction form
    410,823.40/615,543.90 = 385,940.20/x
  3. Step 3: Cross multiply
    410,823.40x = 615,543.90 × 385,940.20
  4. Step 4: Simplify right side
    410,823.40x = 237,563,135,874.78
  5. Step 5: Solve for x
    x = 237,563,135,874.78/410,823.40
  6. Step 6: Final answer
    x = 578,260.97

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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.