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Finding the Fourth Proportional to 1,547.80, 2,321.70 and 1,480.60

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Solution

The fourth proportional to 1,547.80, 2,321.70 and 1,480.60 is: 2,220.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.80 : 2,321.70 = 1,480.60 : x
  2. Step 2: Convert to fraction form
    1,547.80/2,321.70 = 1,480.60/x
  3. Step 3: Cross multiply
    1,547.80x = 2,321.70 × 1,480.60
  4. Step 4: Simplify right side
    1,547.80x = 3,437,509.02
  5. Step 5: Solve for x
    x = 3,437,509.02/1,547.80
  6. Step 6: Final answer
    x = 2,220.90

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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.