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Finding the Fourth Proportional to 551,220.12, 760,553.82 and 312,756.12

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Solution

The fourth proportional to 551,220.12, 760,553.82 and 312,756.12 is: 431,529.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,220.12 : 760,553.82 = 312,756.12 : x
  2. Step 2: Convert to fraction form
    551,220.12/760,553.82 = 312,756.12/x
  3. Step 3: Cross multiply
    551,220.12x = 760,553.82 × 312,756.12
  4. Step 4: Simplify right side
    551,220.12x = 237,867,861,794.38
  5. Step 5: Solve for x
    x = 237,867,861,794.38/551,220.12
  6. Step 6: Final answer
    x = 431,529.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.