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Finding the Fourth Proportional to 1,156.65, 1,735.66 and 426.74

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Solution

The fourth proportional to 1,156.65, 1,735.66 and 426.74 is: 640.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.65 : 1,735.66 = 426.74 : x
  2. Step 2: Convert to fraction form
    1,156.65/1,735.66 = 426.74/x
  3. Step 3: Cross multiply
    1,156.65x = 1,735.66 × 426.74
  4. Step 4: Simplify right side
    1,156.65x = 740,673.41
  5. Step 5: Solve for x
    x = 740,673.41/1,156.65
  6. Step 6: Final answer
    x = 640.36

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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.