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Finding the Fourth Proportional to 1,652.31, 2,280.06 and 989.01

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Solution

The fourth proportional to 1,652.31, 2,280.06 and 989.01 is: 1,364.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,652.31 : 2,280.06 = 989.01 : x
  2. Step 2: Convert to fraction form
    1,652.31/2,280.06 = 989.01/x
  3. Step 3: Cross multiply
    1,652.31x = 2,280.06 × 989.01
  4. Step 4: Simplify right side
    1,652.31x = 2,255,002.14
  5. Step 5: Solve for x
    x = 2,255,002.14/1,652.31
  6. Step 6: Final answer
    x = 1,364.76

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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.