Home / 442,956.20-664,434.30-390,468.20

Finding the Fourth Proportional to 442,956.20, 664,434.30 and 390,468.20

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Solution

The fourth proportional to 442,956.20, 664,434.30 and 390,468.20 is: 585,702.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,956.20 : 664,434.30 = 390,468.20 : x
  2. Step 2: Convert to fraction form
    442,956.20/664,434.30 = 390,468.20/x
  3. Step 3: Cross multiply
    442,956.20x = 664,434.30 × 390,468.20
  4. Step 4: Simplify right side
    442,956.20x = 259,440,465,139.26
  5. Step 5: Solve for x
    x = 259,440,465,139.26/442,956.20
  6. Step 6: Final answer
    x = 585,702.30

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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.