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Finding the Fourth Proportional to 1,142.80, 1,714.32 and 373.12

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Solution

The fourth proportional to 1,142.80, 1,714.32 and 373.12 is: 559.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.80 : 1,714.32 = 373.12 : x
  2. Step 2: Convert to fraction form
    1,142.80/1,714.32 = 373.12/x
  3. Step 3: Cross multiply
    1,142.80x = 1,714.32 × 373.12
  4. Step 4: Simplify right side
    1,142.80x = 639,647.08
  5. Step 5: Solve for x
    x = 639,647.08/1,142.80
  6. Step 6: Final answer
    x = 559.72

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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.