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Finding the Fourth Proportional to 1,432.58, 1,975.28 and 1,328.90

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Solution

The fourth proportional to 1,432.58, 1,975.28 and 1,328.90 is: 1,832.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.58 : 1,975.28 = 1,328.90 : x
  2. Step 2: Convert to fraction form
    1,432.58/1,975.28 = 1,328.90/x
  3. Step 3: Cross multiply
    1,432.58x = 1,975.28 × 1,328.90
  4. Step 4: Simplify right side
    1,432.58x = 2,624,949.59
  5. Step 5: Solve for x
    x = 2,624,949.59/1,432.58
  6. Step 6: Final answer
    x = 1,832.32

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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.