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Finding the Fourth Proportional to 1,472.25, 2,031.57 and 842.67

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Solution

The fourth proportional to 1,472.25, 2,031.57 and 842.67 is: 1,162.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,472.25 : 2,031.57 = 842.67 : x
  2. Step 2: Convert to fraction form
    1,472.25/2,031.57 = 842.67/x
  3. Step 3: Cross multiply
    1,472.25x = 2,031.57 × 842.67
  4. Step 4: Simplify right side
    1,472.25x = 1,711,943.09
  5. Step 5: Solve for x
    x = 1,711,943.09/1,472.25
  6. Step 6: Final answer
    x = 1,162.81

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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.