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Finding the Fourth Proportional to 927.99, 1,280.61 and 508.35

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Solution

The fourth proportional to 927.99, 1,280.61 and 508.35 is: 701.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.99 : 1,280.61 = 508.35 : x
  2. Step 2: Convert to fraction form
    927.99/1,280.61 = 508.35/x
  3. Step 3: Cross multiply
    927.99x = 1,280.61 × 508.35
  4. Step 4: Simplify right side
    927.99x = 650,998.09
  5. Step 5: Solve for x
    x = 650,998.09/927.99
  6. Step 6: Final answer
    x = 701.51

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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.