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Finding the Fourth Proportional to 1,645.32, 2,468.10 and 671.40

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Solution

The fourth proportional to 1,645.32, 2,468.10 and 671.40 is: 1,007.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.32 : 2,468.10 = 671.40 : x
  2. Step 2: Convert to fraction form
    1,645.32/2,468.10 = 671.40/x
  3. Step 3: Cross multiply
    1,645.32x = 2,468.10 × 671.40
  4. Step 4: Simplify right side
    1,645.32x = 1,657,082.34
  5. Step 5: Solve for x
    x = 1,657,082.34/1,645.32
  6. Step 6: Final answer
    x = 1,007.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.