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Finding the Fourth Proportional to 287,870.49, 432,179.92 and 221,357.33

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Solution

The fourth proportional to 287,870.49, 432,179.92 and 221,357.33 is: 332,323.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,870.49 : 432,179.92 = 221,357.33 : x
  2. Step 2: Convert to fraction form
    287,870.49/432,179.92 = 221,357.33/x
  3. Step 3: Cross multiply
    287,870.49x = 432,179.92 × 221,357.33
  4. Step 4: Simplify right side
    287,870.49x = 95,666,189,903.13
  5. Step 5: Solve for x
    x = 95,666,189,903.13/287,870.49
  6. Step 6: Final answer
    x = 332,323.71

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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.