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Finding the Fourth Proportional to 508.65, 761.76 and 291.57

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Solution

The fourth proportional to 508.65, 761.76 and 291.57 is: 436.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.65 : 761.76 = 291.57 : x
  2. Step 2: Convert to fraction form
    508.65/761.76 = 291.57/x
  3. Step 3: Cross multiply
    508.65x = 761.76 × 291.57
  4. Step 4: Simplify right side
    508.65x = 222,106.36
  5. Step 5: Solve for x
    x = 222,106.36/508.65
  6. Step 6: Final answer
    x = 436.66

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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.