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Finding the Fourth Proportional to 873.36, 1,204.20 and 686.52

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Solution

The fourth proportional to 873.36, 1,204.20 and 686.52 is: 946.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.36 : 1,204.20 = 686.52 : x
  2. Step 2: Convert to fraction form
    873.36/1,204.20 = 686.52/x
  3. Step 3: Cross multiply
    873.36x = 1,204.20 × 686.52
  4. Step 4: Simplify right side
    873.36x = 826,707.38
  5. Step 5: Solve for x
    x = 826,707.38/873.36
  6. Step 6: Final answer
    x = 946.58

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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.