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Finding the Fourth Proportional to 1,703.76, 2,351.12 and 957.78

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Solution

The fourth proportional to 1,703.76, 2,351.12 and 957.78 is: 1,321.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,703.76 : 2,351.12 = 957.78 : x
  2. Step 2: Convert to fraction form
    1,703.76/2,351.12 = 957.78/x
  3. Step 3: Cross multiply
    1,703.76x = 2,351.12 × 957.78
  4. Step 4: Simplify right side
    1,703.76x = 2,251,855.71
  5. Step 5: Solve for x
    x = 2,251,855.71/1,703.76
  6. Step 6: Final answer
    x = 1,321.70

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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.