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Finding the Fourth Proportional to 522,079.80, 783,119.70 and 312,127.80

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Solution

The fourth proportional to 522,079.80, 783,119.70 and 312,127.80 is: 468,191.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,079.80 : 783,119.70 = 312,127.80 : x
  2. Step 2: Convert to fraction form
    522,079.80/783,119.70 = 312,127.80/x
  3. Step 3: Cross multiply
    522,079.80x = 783,119.70 × 312,127.80
  4. Step 4: Simplify right side
    522,079.80x = 244,433,429,097.66
  5. Step 5: Solve for x
    x = 244,433,429,097.66/522,079.80
  6. Step 6: Final answer
    x = 468,191.70

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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.