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Finding the Fourth Proportional to 508,934.70, 762,916.05 and 189,000.90

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Solution

The fourth proportional to 508,934.70, 762,916.05 and 189,000.90 is: 283,320.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,934.70 : 762,916.05 = 189,000.90 : x
  2. Step 2: Convert to fraction form
    508,934.70/762,916.05 = 189,000.90/x
  3. Step 3: Cross multiply
    508,934.70x = 762,916.05 × 189,000.90
  4. Step 4: Simplify right side
    508,934.70x = 144,191,820,074.45
  5. Step 5: Solve for x
    x = 144,191,820,074.45/508,934.70
  6. Step 6: Final answer
    x = 283,320.87

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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.