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Finding the Fourth Proportional to 611.65, 918.08 and 337.87

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Solution

The fourth proportional to 611.65, 918.08 and 337.87 is: 507.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.65 : 918.08 = 337.87 : x
  2. Step 2: Convert to fraction form
    611.65/918.08 = 337.87/x
  3. Step 3: Cross multiply
    611.65x = 918.08 × 337.87
  4. Step 4: Simplify right side
    611.65x = 310,191.69
  5. Step 5: Solve for x
    x = 310,191.69/611.65
  6. Step 6: Final answer
    x = 507.14

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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.