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Finding the Fourth Proportional to 1,652.65, 2,280.59 and 989.87

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Solution

The fourth proportional to 1,652.65, 2,280.59 and 989.87 is: 1,365.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,652.65 : 2,280.59 = 989.87 : x
  2. Step 2: Convert to fraction form
    1,652.65/2,280.59 = 989.87/x
  3. Step 3: Cross multiply
    1,652.65x = 2,280.59 × 989.87
  4. Step 4: Simplify right side
    1,652.65x = 2,257,484.10
  5. Step 5: Solve for x
    x = 2,257,484.10/1,652.65
  6. Step 6: Final answer
    x = 1,365.98

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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.