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Finding the Fourth Proportional to 932.58, 1,288.62 and 684.72

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Solution

The fourth proportional to 932.58, 1,288.62 and 684.72 is: 946.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.58 : 1,288.62 = 684.72 : x
  2. Step 2: Convert to fraction form
    932.58/1,288.62 = 684.72/x
  3. Step 3: Cross multiply
    932.58x = 1,288.62 × 684.72
  4. Step 4: Simplify right side
    932.58x = 882,343.89
  5. Step 5: Solve for x
    x = 882,343.89/932.58
  6. Step 6: Final answer
    x = 946.13

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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.