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Finding the Fourth Proportional to 615,632.40, 921,893.40 and 491,216.40

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Solution

The fourth proportional to 615,632.40, 921,893.40 and 491,216.40 is: 735,583.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,632.40 : 921,893.40 = 491,216.40 : x
  2. Step 2: Convert to fraction form
    615,632.40/921,893.40 = 491,216.40/x
  3. Step 3: Cross multiply
    615,632.40x = 921,893.40 × 491,216.40
  4. Step 4: Simplify right side
    615,632.40x = 452,849,157,131.76
  5. Step 5: Solve for x
    x = 452,849,157,131.76/615,632.40
  6. Step 6: Final answer
    x = 735,583.70

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Double scale
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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.