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Finding the Fourth Proportional to 956.10, 1,319.23 and 690.95

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Solution

The fourth proportional to 956.10, 1,319.23 and 690.95 is: 953.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.10 : 1,319.23 = 690.95 : x
  2. Step 2: Convert to fraction form
    956.10/1,319.23 = 690.95/x
  3. Step 3: Cross multiply
    956.10x = 1,319.23 × 690.95
  4. Step 4: Simplify right side
    956.10x = 911,521.97
  5. Step 5: Solve for x
    x = 911,521.97/956.10
  6. Step 6: Final answer
    x = 953.38

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Half scale
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Double scale
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1.5x scale

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.