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Finding the Fourth Proportional to 932.61, 1,285.47 and 683.54

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Solution

The fourth proportional to 932.61, 1,285.47 and 683.54 is: 942.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.61 : 1,285.47 = 683.54 : x
  2. Step 2: Convert to fraction form
    932.61/1,285.47 = 683.54/x
  3. Step 3: Cross multiply
    932.61x = 1,285.47 × 683.54
  4. Step 4: Simplify right side
    932.61x = 878,668.56
  5. Step 5: Solve for x
    x = 878,668.56/932.61
  6. Step 6: Final answer
    x = 942.16

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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.