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Finding the Fourth Proportional to 1,306.45, 1,959.95 and 440.83

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Solution

The fourth proportional to 1,306.45, 1,959.95 and 440.83 is: 661.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.45 : 1,959.95 = 440.83 : x
  2. Step 2: Convert to fraction form
    1,306.45/1,959.95 = 440.83/x
  3. Step 3: Cross multiply
    1,306.45x = 1,959.95 × 440.83
  4. Step 4: Simplify right side
    1,306.45x = 864,002.55
  5. Step 5: Solve for x
    x = 864,002.55/1,306.45
  6. Step 6: Final answer
    x = 661.34

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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.