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Finding the Fourth Proportional to 340.36, 510.58 and 253.80

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Solution

The fourth proportional to 340.36, 510.58 and 253.80 is: 380.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.36 : 510.58 = 253.80 : x
  2. Step 2: Convert to fraction form
    340.36/510.58 = 253.80/x
  3. Step 3: Cross multiply
    340.36x = 510.58 × 253.80
  4. Step 4: Simplify right side
    340.36x = 129,585.20
  5. Step 5: Solve for x
    x = 129,585.20/340.36
  6. Step 6: Final answer
    x = 380.73

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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.