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Finding the Fourth Proportional to 519,889.70, 779,834.55 and 317,810.90

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Solution

The fourth proportional to 519,889.70, 779,834.55 and 317,810.90 is: 476,716.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,889.70 : 779,834.55 = 317,810.90 : x
  2. Step 2: Convert to fraction form
    519,889.70/779,834.55 = 317,810.90/x
  3. Step 3: Cross multiply
    519,889.70x = 779,834.55 × 317,810.90
  4. Step 4: Simplify right side
    519,889.70x = 247,839,920,186.60
  5. Step 5: Solve for x
    x = 247,839,920,186.60/519,889.70
  6. Step 6: Final answer
    x = 476,716.35

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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.