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Finding the Fourth Proportional to 340.67, 508.86 and 291.68

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Solution

The fourth proportional to 340.67, 508.86 and 291.68 is: 435.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.67 : 508.86 = 291.68 : x
  2. Step 2: Convert to fraction form
    340.67/508.86 = 291.68/x
  3. Step 3: Cross multiply
    340.67x = 508.86 × 291.68
  4. Step 4: Simplify right side
    340.67x = 148,423.65
  5. Step 5: Solve for x
    x = 148,423.65/340.67
  6. Step 6: Final answer
    x = 435.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.