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Finding the Fourth Proportional to 1,471.84, 2,031.06 and 842.38

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Solution

The fourth proportional to 1,471.84, 2,031.06 and 842.38 is: 1,162.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,471.84 : 2,031.06 = 842.38 : x
  2. Step 2: Convert to fraction form
    1,471.84/2,031.06 = 842.38/x
  3. Step 3: Cross multiply
    1,471.84x = 2,031.06 × 842.38
  4. Step 4: Simplify right side
    1,471.84x = 1,710,924.32
  5. Step 5: Solve for x
    x = 1,710,924.32/1,471.84
  6. Step 6: Final answer
    x = 1,162.44

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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.