Home / 1,479.30-2,218.18-439.16

Finding the Fourth Proportional to 1,479.30, 2,218.18 and 439.16

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Solution

The fourth proportional to 1,479.30, 2,218.18 and 439.16 is: 658.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.30 : 2,218.18 = 439.16 : x
  2. Step 2: Convert to fraction form
    1,479.30/2,218.18 = 439.16/x
  3. Step 3: Cross multiply
    1,479.30x = 2,218.18 × 439.16
  4. Step 4: Simplify right side
    1,479.30x = 974,123.74
  5. Step 5: Solve for x
    x = 974,123.74/1,479.30
  6. Step 6: Final answer
    x = 658.50

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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.