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Finding the Fourth Proportional to 712.08, 979.65 and 695.70

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Solution

The fourth proportional to 712.08, 979.65 and 695.70 is: 957.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.08 : 979.65 = 695.70 : x
  2. Step 2: Convert to fraction form
    712.08/979.65 = 695.70/x
  3. Step 3: Cross multiply
    712.08x = 979.65 × 695.70
  4. Step 4: Simplify right side
    712.08x = 681,542.51
  5. Step 5: Solve for x
    x = 681,542.51/712.08
  6. Step 6: Final answer
    x = 957.12

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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.