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Finding the Fourth Proportional to 874,663.79, 1,206,998.73 and 487,458.60

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Solution

The fourth proportional to 874,663.79, 1,206,998.73 and 487,458.60 is: 672,672.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,663.79 : 1,206,998.73 = 487,458.60 : x
  2. Step 2: Convert to fraction form
    874,663.79/1,206,998.73 = 487,458.60/x
  3. Step 3: Cross multiply
    874,663.79x = 1,206,998.73 × 487,458.60
  4. Step 4: Simplify right side
    874,663.79x = 588,361,911,127.58
  5. Step 5: Solve for x
    x = 588,361,911,127.58/874,663.79
  6. Step 6: Final answer
    x = 672,672.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.