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Finding the Fourth Proportional to 512,870.32, 769,412.40 and 157,866.76

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Solution

The fourth proportional to 512,870.32, 769,412.40 and 157,866.76 is: 236,833.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,870.32 : 769,412.40 = 157,866.76 : x
  2. Step 2: Convert to fraction form
    512,870.32/769,412.40 = 157,866.76/x
  3. Step 3: Cross multiply
    512,870.32x = 769,412.40 × 157,866.76
  4. Step 4: Simplify right side
    512,870.32x = 121,464,642,691.82
  5. Step 5: Solve for x
    x = 121,464,642,691.82/512,870.32
  6. Step 6: Final answer
    x = 236,833.05

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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.