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Finding the Fourth Proportional to 512,139.60, 715,666.83 and 512,139.60

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Solution

The fourth proportional to 512,139.60, 715,666.83 and 512,139.60 is: 715,666.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,139.60 : 715,666.83 = 512,139.60 : x
  2. Step 2: Convert to fraction form
    512,139.60/715,666.83 = 512,139.60/x
  3. Step 3: Cross multiply
    512,139.60x = 715,666.83 × 512,139.60
  4. Step 4: Simplify right side
    512,139.60x = 366,521,324,049.47
  5. Step 5: Solve for x
    x = 366,521,324,049.47/512,139.60
  6. Step 6: Final answer
    x = 715,666.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.