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Finding the Fourth Proportional to 579,956.20, 869,934.30 and 486,644.20

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Solution

The fourth proportional to 579,956.20, 869,934.30 and 486,644.20 is: 729,966.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,956.20 : 869,934.30 = 486,644.20 : x
  2. Step 2: Convert to fraction form
    579,956.20/869,934.30 = 486,644.20/x
  3. Step 3: Cross multiply
    579,956.20x = 869,934.30 × 486,644.20
  4. Step 4: Simplify right side
    579,956.20x = 423,348,481,476.06
  5. Step 5: Solve for x
    x = 423,348,481,476.06/579,956.20
  6. Step 6: Final answer
    x = 729,966.30

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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.