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Finding the Fourth Proportional to 611.34, 913.04 and 501.90

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Solution

The fourth proportional to 611.34, 913.04 and 501.90 is: 749.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.34 : 913.04 = 501.90 : x
  2. Step 2: Convert to fraction form
    611.34/913.04 = 501.90/x
  3. Step 3: Cross multiply
    611.34x = 913.04 × 501.90
  4. Step 4: Simplify right side
    611.34x = 458,252.27
  5. Step 5: Solve for x
    x = 458,252.27/611.34
  6. Step 6: Final answer
    x = 749.59

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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.