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Finding the Fourth Proportional to 579,659.70, 869,489.55 and 242,642.10

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Solution

The fourth proportional to 579,659.70, 869,489.55 and 242,642.10 is: 363,963.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,659.70 : 869,489.55 = 242,642.10 : x
  2. Step 2: Convert to fraction form
    579,659.70/869,489.55 = 242,642.10/x
  3. Step 3: Cross multiply
    579,659.70x = 869,489.55 × 242,642.10
  4. Step 4: Simplify right side
    579,659.70x = 210,974,770,340.06
  5. Step 5: Solve for x
    x = 210,974,770,340.06/579,659.70
  6. Step 6: Final answer
    x = 363,963.15

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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.