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Finding the Fourth Proportional to 1,478.12, 2,217.47 and 504.90

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Solution

The fourth proportional to 1,478.12, 2,217.47 and 504.90 is: 757.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.12 : 2,217.47 = 504.90 : x
  2. Step 2: Convert to fraction form
    1,478.12/2,217.47 = 504.90/x
  3. Step 3: Cross multiply
    1,478.12x = 2,217.47 × 504.90
  4. Step 4: Simplify right side
    1,478.12x = 1,119,598.08
  5. Step 5: Solve for x
    x = 1,119,598.08/1,478.12
  6. Step 6: Final answer
    x = 757.45

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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.