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Finding the Fourth Proportional to 1,479.61, 2,219.53 and 492.38

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Solution

The fourth proportional to 1,479.61, 2,219.53 and 492.38 is: 738.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.61 : 2,219.53 = 492.38 : x
  2. Step 2: Convert to fraction form
    1,479.61/2,219.53 = 492.38/x
  3. Step 3: Cross multiply
    1,479.61x = 2,219.53 × 492.38
  4. Step 4: Simplify right side
    1,479.61x = 1,092,856.50
  5. Step 5: Solve for x
    x = 1,092,856.50/1,479.61
  6. Step 6: Final answer
    x = 738.61

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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.