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Finding the Fourth Proportional to 340.23, 510.31 and 291.81

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Solution

The fourth proportional to 340.23, 510.31 and 291.81 is: 437.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.23 : 510.31 = 291.81 : x
  2. Step 2: Convert to fraction form
    340.23/510.31 = 291.81/x
  3. Step 3: Cross multiply
    340.23x = 510.31 × 291.81
  4. Step 4: Simplify right side
    340.23x = 148,913.56
  5. Step 5: Solve for x
    x = 148,913.56/340.23
  6. Step 6: Final answer
    x = 437.68

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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.