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Finding the Fourth Proportional to 1,380.76, 2,070.14 and 456.04

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Solution

The fourth proportional to 1,380.76, 2,070.14 and 456.04 is: 683.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.76 : 2,070.14 = 456.04 : x
  2. Step 2: Convert to fraction form
    1,380.76/2,070.14 = 456.04/x
  3. Step 3: Cross multiply
    1,380.76x = 2,070.14 × 456.04
  4. Step 4: Simplify right side
    1,380.76x = 944,066.65
  5. Step 5: Solve for x
    x = 944,066.65/1,380.76
  6. Step 6: Final answer
    x = 683.73

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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.