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Finding the Fourth Proportional to 1,478.49, 2,217.50 and 452.25

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Solution

The fourth proportional to 1,478.49, 2,217.50 and 452.25 is: 678.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.49 : 2,217.50 = 452.25 : x
  2. Step 2: Convert to fraction form
    1,478.49/2,217.50 = 452.25/x
  3. Step 3: Cross multiply
    1,478.49x = 2,217.50 × 452.25
  4. Step 4: Simplify right side
    1,478.49x = 1,002,862.11
  5. Step 5: Solve for x
    x = 1,002,862.11/1,478.49
  6. Step 6: Final answer
    x = 678.30

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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.