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Finding the Fourth Proportional to 1,574.18, 2,361.26 and 478.55

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Solution

The fourth proportional to 1,574.18, 2,361.26 and 478.55 is: 717.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,574.18 : 2,361.26 = 478.55 : x
  2. Step 2: Convert to fraction form
    1,574.18/2,361.26 = 478.55/x
  3. Step 3: Cross multiply
    1,574.18x = 2,361.26 × 478.55
  4. Step 4: Simplify right side
    1,574.18x = 1,129,988.07
  5. Step 5: Solve for x
    x = 1,129,988.07/1,574.18
  6. Step 6: Final answer
    x = 717.83

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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.