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Finding the Fourth Proportional to 1,039.96, 1,559.74 and 346.68

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Solution

The fourth proportional to 1,039.96, 1,559.74 and 346.68 is: 519.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.96 : 1,559.74 = 346.68 : x
  2. Step 2: Convert to fraction form
    1,039.96/1,559.74 = 346.68/x
  3. Step 3: Cross multiply
    1,039.96x = 1,559.74 × 346.68
  4. Step 4: Simplify right side
    1,039.96x = 540,730.66
  5. Step 5: Solve for x
    x = 540,730.66/1,039.96
  6. Step 6: Final answer
    x = 519.95

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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.