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Finding the Fourth Proportional to 1,234.65, 1,703.81 and 675.12

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Solution

The fourth proportional to 1,234.65, 1,703.81 and 675.12 is: 931.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,234.65 : 1,703.81 = 675.12 : x
  2. Step 2: Convert to fraction form
    1,234.65/1,703.81 = 675.12/x
  3. Step 3: Cross multiply
    1,234.65x = 1,703.81 × 675.12
  4. Step 4: Simplify right side
    1,234.65x = 1,150,276.21
  5. Step 5: Solve for x
    x = 1,150,276.21/1,234.65
  6. Step 6: Final answer
    x = 931.66

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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.