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Finding the Fourth Proportional to 1,652.52, 2,280.51 and 989.40

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Solution

The fourth proportional to 1,652.52, 2,280.51 and 989.40 is: 1,365.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,652.52 : 2,280.51 = 989.40 : x
  2. Step 2: Convert to fraction form
    1,652.52/2,280.51 = 989.40/x
  3. Step 3: Cross multiply
    1,652.52x = 2,280.51 × 989.40
  4. Step 4: Simplify right side
    1,652.52x = 2,256,336.59
  5. Step 5: Solve for x
    x = 2,256,336.59/1,652.52
  6. Step 6: Final answer
    x = 1,365.39

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1.5x scale

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.