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Finding the Fourth Proportional to 508,919.40, 763,379.10 and 446,711.40

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Solution

The fourth proportional to 508,919.40, 763,379.10 and 446,711.40 is: 670,067.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,919.40 : 763,379.10 = 446,711.40 : x
  2. Step 2: Convert to fraction form
    508,919.40/763,379.10 = 446,711.40/x
  3. Step 3: Cross multiply
    508,919.40x = 763,379.10 × 446,711.40
  4. Step 4: Simplify right side
    508,919.40x = 341,010,146,491.74
  5. Step 5: Solve for x
    x = 341,010,146,491.74/508,919.40
  6. Step 6: Final answer
    x = 670,067.10

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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.