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Finding the Fourth Proportional to 1,010.61, 1,508.37 and 986.01

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Solution

The fourth proportional to 1,010.61, 1,508.37 and 986.01 is: 1,471.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.61 : 1,508.37 = 986.01 : x
  2. Step 2: Convert to fraction form
    1,010.61/1,508.37 = 986.01/x
  3. Step 3: Cross multiply
    1,010.61x = 1,508.37 × 986.01
  4. Step 4: Simplify right side
    1,010.61x = 1,487,267.90
  5. Step 5: Solve for x
    x = 1,487,267.90/1,010.61
  6. Step 6: Final answer
    x = 1,471.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.