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Finding the Fourth Proportional to 713.51, 1,070.05 and 251.20

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Solution

The fourth proportional to 713.51, 1,070.05 and 251.20 is: 376.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.51 : 1,070.05 = 251.20 : x
  2. Step 2: Convert to fraction form
    713.51/1,070.05 = 251.20/x
  3. Step 3: Cross multiply
    713.51x = 1,070.05 × 251.20
  4. Step 4: Simplify right side
    713.51x = 268,796.56
  5. Step 5: Solve for x
    x = 268,796.56/713.51
  6. Step 6: Final answer
    x = 376.72

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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.