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Finding the Fourth Proportional to 703.98, 1,060.19 and 641.70

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Solution

The fourth proportional to 703.98, 1,060.19 and 641.70 is: 966.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.98 : 1,060.19 = 641.70 : x
  2. Step 2: Convert to fraction form
    703.98/1,060.19 = 641.70/x
  3. Step 3: Cross multiply
    703.98x = 1,060.19 × 641.70
  4. Step 4: Simplify right side
    703.98x = 680,325.53
  5. Step 5: Solve for x
    x = 680,325.53/703.98
  6. Step 6: Final answer
    x = 966.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.