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Finding the Fourth Proportional to 1,480.40, 2,220.59 and 506.78

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Solution

The fourth proportional to 1,480.40, 2,220.59 and 506.78 is: 760.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,480.40 : 2,220.59 = 506.78 : x
  2. Step 2: Convert to fraction form
    1,480.40/2,220.59 = 506.78/x
  3. Step 3: Cross multiply
    1,480.40x = 2,220.59 × 506.78
  4. Step 4: Simplify right side
    1,480.40x = 1,125,340.76
  5. Step 5: Solve for x
    x = 1,125,340.76/1,480.40
  6. Step 6: Final answer
    x = 760.16

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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.