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Finding the Fourth Proportional to 512,488.76, 707,240.18 and 283,040.72

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Solution

The fourth proportional to 512,488.76, 707,240.18 and 283,040.72 is: 390,599.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,488.76 : 707,240.18 = 283,040.72 : x
  2. Step 2: Convert to fraction form
    512,488.76/707,240.18 = 283,040.72/x
  3. Step 3: Cross multiply
    512,488.76x = 707,240.18 × 283,040.72
  4. Step 4: Simplify right side
    512,488.76x = 200,177,767,991.58
  5. Step 5: Solve for x
    x = 200,177,767,991.58/512,488.76
  6. Step 6: Final answer
    x = 390,599.33

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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.