Home / 442,972.20-664,458.30-390,484.20

Finding the Fourth Proportional to 442,972.20, 664,458.30 and 390,484.20

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Solution

The fourth proportional to 442,972.20, 664,458.30 and 390,484.20 is: 585,726.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,972.20 : 664,458.30 = 390,484.20 : x
  2. Step 2: Convert to fraction form
    442,972.20/664,458.30 = 390,484.20/x
  3. Step 3: Cross multiply
    442,972.20x = 664,458.30 × 390,484.20
  4. Step 4: Simplify right side
    442,972.20x = 259,460,467,708.86
  5. Step 5: Solve for x
    x = 259,460,467,708.86/442,972.20
  6. Step 6: Final answer
    x = 585,726.30

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1.5x scale

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.