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Finding the Fourth Proportional to 452,843.20, 679,264.80 and 407,742.40

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Solution

The fourth proportional to 452,843.20, 679,264.80 and 407,742.40 is: 611,613.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,843.20 : 679,264.80 = 407,742.40 : x
  2. Step 2: Convert to fraction form
    452,843.20/679,264.80 = 407,742.40/x
  3. Step 3: Cross multiply
    452,843.20x = 679,264.80 × 407,742.40
  4. Step 4: Simplify right side
    452,843.20x = 276,965,059,787.52
  5. Step 5: Solve for x
    x = 276,965,059,787.52/452,843.20
  6. Step 6: Final answer
    x = 611,613.60

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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.