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Finding the Fourth Proportional to 611,187.40, 916,219.80 and 211,548.69

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Solution

The fourth proportional to 611,187.40, 916,219.80 and 211,548.69 is: 317,128.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,187.40 : 916,219.80 = 211,548.69 : x
  2. Step 2: Convert to fraction form
    611,187.40/916,219.80 = 211,548.69/x
  3. Step 3: Cross multiply
    611,187.40x = 916,219.80 × 211,548.69
  4. Step 4: Simplify right side
    611,187.40x = 193,825,096,151.51
  5. Step 5: Solve for x
    x = 193,825,096,151.51/611,187.40
  6. Step 6: Final answer
    x = 317,128.75

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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.