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Finding the Fourth Proportional to 1,695.20, 2,339.03 and 1,031.60

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Solution

The fourth proportional to 1,695.20, 2,339.03 and 1,031.60 is: 1,423.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,695.20 : 2,339.03 = 1,031.60 : x
  2. Step 2: Convert to fraction form
    1,695.20/2,339.03 = 1,031.60/x
  3. Step 3: Cross multiply
    1,695.20x = 2,339.03 × 1,031.60
  4. Step 4: Simplify right side
    1,695.20x = 2,412,951.77
  5. Step 5: Solve for x
    x = 2,412,951.77/1,695.20
  6. Step 6: Final answer
    x = 1,423.41

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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.