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Finding the Fourth Proportional to 860.16, 1,186.68 and 545.32

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Solution

The fourth proportional to 860.16, 1,186.68 and 545.32 is: 752.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.16 : 1,186.68 = 545.32 : x
  2. Step 2: Convert to fraction form
    860.16/1,186.68 = 545.32/x
  3. Step 3: Cross multiply
    860.16x = 1,186.68 × 545.32
  4. Step 4: Simplify right side
    860.16x = 647,120.34
  5. Step 5: Solve for x
    x = 647,120.34/860.16
  6. Step 6: Final answer
    x = 752.33

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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.