Home / 442,974.20-664,461.30-390,486.20

Finding the Fourth Proportional to 442,974.20, 664,461.30 and 390,486.20

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Solution

The fourth proportional to 442,974.20, 664,461.30 and 390,486.20 is: 585,729.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,974.20 : 664,461.30 = 390,486.20 : x
  2. Step 2: Convert to fraction form
    442,974.20/664,461.30 = 390,486.20/x
  3. Step 3: Cross multiply
    442,974.20x = 664,461.30 × 390,486.20
  4. Step 4: Simplify right side
    442,974.20x = 259,462,968,084.06
  5. Step 5: Solve for x
    x = 259,462,968,084.06/442,974.20
  6. Step 6: Final answer
    x = 585,729.30

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Similar ratio
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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.