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Finding the Fourth Proportional to 1,479.20, 1,998 and 1,479.20

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Solution

The fourth proportional to 1,479.20, 1,998 and 1,479.20 is: 1,998

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.20 : 1,998 = 1,479.20 : x
  2. Step 2: Convert to fraction form
    1,479.20/1,998 = 1,479.20/x
  3. Step 3: Cross multiply
    1,479.20x = 1,998 × 1,479.20
  4. Step 4: Simplify right side
    1,479.20x = 2,955,441.60
  5. Step 5: Solve for x
    x = 2,955,441.60/1,479.20
  6. Step 6: Final answer
    x = 1,998

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.