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Finding the Fourth Proportional to 1,672.32, 2,307.20 and 936.32

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Solution

The fourth proportional to 1,672.32, 2,307.20 and 936.32 is: 1,291.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.32 : 2,307.20 = 936.32 : x
  2. Step 2: Convert to fraction form
    1,672.32/2,307.20 = 936.32/x
  3. Step 3: Cross multiply
    1,672.32x = 2,307.20 × 936.32
  4. Step 4: Simplify right side
    1,672.32x = 2,160,277.50
  5. Step 5: Solve for x
    x = 2,160,277.50/1,672.32
  6. Step 6: Final answer
    x = 1,291.78

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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.