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Finding the Fourth Proportional to 2,031.62, 3,047.78 and 644.93

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Solution

The fourth proportional to 2,031.62, 3,047.78 and 644.93 is: 967.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,031.62 : 3,047.78 = 644.93 : x
  2. Step 2: Convert to fraction form
    2,031.62/3,047.78 = 644.93/x
  3. Step 3: Cross multiply
    2,031.62x = 3,047.78 × 644.93
  4. Step 4: Simplify right side
    2,031.62x = 1,965,586.29
  5. Step 5: Solve for x
    x = 1,965,586.29/2,031.62
  6. Step 6: Final answer
    x = 967.50

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1.5x scale

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.