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Finding the Fourth Proportional to 910.72, 1,362.42 and 703.72

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Solution

The fourth proportional to 910.72, 1,362.42 and 703.72 is: 1,052.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.72 : 1,362.42 = 703.72 : x
  2. Step 2: Convert to fraction form
    910.72/1,362.42 = 703.72/x
  3. Step 3: Cross multiply
    910.72x = 1,362.42 × 703.72
  4. Step 4: Simplify right side
    910.72x = 958,762.20
  5. Step 5: Solve for x
    x = 958,762.20/910.72
  6. Step 6: Final answer
    x = 1,052.75

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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.