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Finding the Fourth Proportional to 611.74, 910.79 and 603.11

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Solution

The fourth proportional to 611.74, 910.79 and 603.11 is: 897.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.74 : 910.79 = 603.11 : x
  2. Step 2: Convert to fraction form
    611.74/910.79 = 603.11/x
  3. Step 3: Cross multiply
    611.74x = 910.79 × 603.11
  4. Step 4: Simplify right side
    611.74x = 549,311.47
  5. Step 5: Solve for x
    x = 549,311.47/611.74
  6. Step 6: Final answer
    x = 897.96

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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.