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Finding the Fourth Proportional to 615,604.40, 921,851.40 and 491,188.40

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Solution

The fourth proportional to 615,604.40, 921,851.40 and 491,188.40 is: 735,541.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,604.40 : 921,851.40 = 491,188.40 : x
  2. Step 2: Convert to fraction form
    615,604.40/921,851.40 = 491,188.40/x
  3. Step 3: Cross multiply
    615,604.40x = 921,851.40 × 491,188.40
  4. Step 4: Simplify right side
    615,604.40x = 452,802,714,203.76
  5. Step 5: Solve for x
    x = 452,802,714,203.76/615,604.40
  6. Step 6: Final answer
    x = 735,541.71

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Similar ratio
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1.5x scale

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.