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Finding the Fourth Proportional to 509.74, 763.67 and 474.19

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Solution

The fourth proportional to 509.74, 763.67 and 474.19 is: 710.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.74 : 763.67 = 474.19 : x
  2. Step 2: Convert to fraction form
    509.74/763.67 = 474.19/x
  3. Step 3: Cross multiply
    509.74x = 763.67 × 474.19
  4. Step 4: Simplify right side
    509.74x = 362,123.95
  5. Step 5: Solve for x
    x = 362,123.95/509.74
  6. Step 6: Final answer
    x = 710.41

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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.