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Finding the Fourth Proportional to 521,339.32, 718,835.30 and 417,890.80

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Solution

The fourth proportional to 521,339.32, 718,835.30 and 417,890.80 is: 576,197.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,339.32 : 718,835.30 = 417,890.80 : x
  2. Step 2: Convert to fraction form
    521,339.32/718,835.30 = 417,890.80/x
  3. Step 3: Cross multiply
    521,339.32x = 718,835.30 × 417,890.80
  4. Step 4: Simplify right side
    521,339.32x = 300,394,658,585.24
  5. Step 5: Solve for x
    x = 300,394,658,585.24/521,339.32
  6. Step 6: Final answer
    x = 576,197.97

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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.