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Finding the Fourth Proportional to 1,475.13, 2,211.84 and 782.13

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Solution

The fourth proportional to 1,475.13, 2,211.84 and 782.13 is: 1,172.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.13 : 2,211.84 = 782.13 : x
  2. Step 2: Convert to fraction form
    1,475.13/2,211.84 = 782.13/x
  3. Step 3: Cross multiply
    1,475.13x = 2,211.84 × 782.13
  4. Step 4: Simplify right side
    1,475.13x = 1,729,946.42
  5. Step 5: Solve for x
    x = 1,729,946.42/1,475.13
  6. Step 6: Final answer
    x = 1,172.74

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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.