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Finding the Fourth Proportional to 340.26, 510.60 and 253.68

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Solution

The fourth proportional to 340.26, 510.60 and 253.68 is: 380.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.26 : 510.60 = 253.68 : x
  2. Step 2: Convert to fraction form
    340.26/510.60 = 253.68/x
  3. Step 3: Cross multiply
    340.26x = 510.60 × 253.68
  4. Step 4: Simplify right side
    340.26x = 129,529.01
  5. Step 5: Solve for x
    x = 129,529.01/340.26
  6. Step 6: Final answer
    x = 380.68

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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.