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Finding the Fourth Proportional to 1,043.32, 1,440 and 650.08

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Solution

The fourth proportional to 1,043.32, 1,440 and 650.08 is: 897.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.32 : 1,440 = 650.08 : x
  2. Step 2: Convert to fraction form
    1,043.32/1,440 = 650.08/x
  3. Step 3: Cross multiply
    1,043.32x = 1,440 × 650.08
  4. Step 4: Simplify right side
    1,043.32x = 936,115.20
  5. Step 5: Solve for x
    x = 936,115.20/1,043.32
  6. Step 6: Final answer
    x = 897.25

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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.