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Finding the Fourth Proportional to 930.61, 1,284.18 and 510.88

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Solution

The fourth proportional to 930.61, 1,284.18 and 510.88 is: 704.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.61 : 1,284.18 = 510.88 : x
  2. Step 2: Convert to fraction form
    930.61/1,284.18 = 510.88/x
  3. Step 3: Cross multiply
    930.61x = 1,284.18 × 510.88
  4. Step 4: Simplify right side
    930.61x = 656,055.46
  5. Step 5: Solve for x
    x = 656,055.46/930.61
  6. Step 6: Final answer
    x = 704.97

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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.