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Finding the Fourth Proportional to 611,187.72, 916,220.28 and 211,549.01

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Solution

The fourth proportional to 611,187.72, 916,220.28 and 211,549.01 is: 317,129.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,187.72 : 916,220.28 = 211,549.01 : x
  2. Step 2: Convert to fraction form
    611,187.72/916,220.28 = 211,549.01/x
  3. Step 3: Cross multiply
    611,187.72x = 916,220.28 × 211,549.01
  4. Step 4: Simplify right side
    611,187.72x = 193,825,493,175.92
  5. Step 5: Solve for x
    x = 193,825,493,175.92/611,187.72
  6. Step 6: Final answer
    x = 317,129.23

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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.