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Finding the Fourth Proportional to 508,717.70, 763,076.55 and 479,687.30

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Solution

The fourth proportional to 508,717.70, 763,076.55 and 479,687.30 is: 719,530.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,717.70 : 763,076.55 = 479,687.30 : x
  2. Step 2: Convert to fraction form
    508,717.70/763,076.55 = 479,687.30/x
  3. Step 3: Cross multiply
    508,717.70x = 763,076.55 × 479,687.30
  4. Step 4: Simplify right side
    508,717.70x = 366,038,129,962.82
  5. Step 5: Solve for x
    x = 366,038,129,962.82/508,717.70
  6. Step 6: Final answer
    x = 719,530.95

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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.