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Finding the Fourth Proportional to 611.46, 910.80 and 609.30

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Solution

The fourth proportional to 611.46, 910.80 and 609.30 is: 907.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.46 : 910.80 = 609.30 : x
  2. Step 2: Convert to fraction form
    611.46/910.80 = 609.30/x
  3. Step 3: Cross multiply
    611.46x = 910.80 × 609.30
  4. Step 4: Simplify right side
    611.46x = 554,950.44
  5. Step 5: Solve for x
    x = 554,950.44/611.46
  6. Step 6: Final answer
    x = 907.58

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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.