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Finding the Fourth Proportional to 768.62, 1,060.80 and 703.01

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Solution

The fourth proportional to 768.62, 1,060.80 and 703.01 is: 970.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.62 : 1,060.80 = 703.01 : x
  2. Step 2: Convert to fraction form
    768.62/1,060.80 = 703.01/x
  3. Step 3: Cross multiply
    768.62x = 1,060.80 × 703.01
  4. Step 4: Simplify right side
    768.62x = 745,753.02
  5. Step 5: Solve for x
    x = 745,753.02/768.62
  6. Step 6: Final answer
    x = 970.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.