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Finding the Fourth Proportional to 660,998.88, 991,502.56 and 211,788

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Solution

The fourth proportional to 660,998.88, 991,502.56 and 211,788 is: 317,683.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,998.88 : 991,502.56 = 211,788 : x
  2. Step 2: Convert to fraction form
    660,998.88/991,502.56 = 211,788/x
  3. Step 3: Cross multiply
    660,998.88x = 991,502.56 × 211,788
  4. Step 4: Simplify right side
    660,998.88x = 209,988,344,177.28
  5. Step 5: Solve for x
    x = 209,988,344,177.28/660,998.88
  6. Step 6: Final answer
    x = 317,683.36

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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.