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Finding the Fourth Proportional to 1,574.67, 2,361.30 and 478.80

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Solution

The fourth proportional to 1,574.67, 2,361.30 and 478.80 is: 717.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,574.67 : 2,361.30 = 478.80 : x
  2. Step 2: Convert to fraction form
    1,574.67/2,361.30 = 478.80/x
  3. Step 3: Cross multiply
    1,574.67x = 2,361.30 × 478.80
  4. Step 4: Simplify right side
    1,574.67x = 1,130,590.44
  5. Step 5: Solve for x
    x = 1,130,590.44/1,574.67
  6. Step 6: Final answer
    x = 717.99

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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.