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Finding the Fourth Proportional to 340.81, 510.70 and 253.74

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Solution

The fourth proportional to 340.81, 510.70 and 253.74 is: 380.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.81 : 510.70 = 253.74 : x
  2. Step 2: Convert to fraction form
    340.81/510.70 = 253.74/x
  3. Step 3: Cross multiply
    340.81x = 510.70 × 253.74
  4. Step 4: Simplify right side
    340.81x = 129,582.46
  5. Step 5: Solve for x
    x = 129,582.46/340.81
  6. Step 6: Final answer
    x = 380.22

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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.