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Finding the Fourth Proportional to 868,456.40, 1,302,641.40 and 447,774.80

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Solution

The fourth proportional to 868,456.40, 1,302,641.40 and 447,774.80 is: 671,639.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,456.40 : 1,302,641.40 = 447,774.80 : x
  2. Step 2: Convert to fraction form
    868,456.40/1,302,641.40 = 447,774.80/x
  3. Step 3: Cross multiply
    868,456.40x = 1,302,641.40 × 447,774.80
  4. Step 4: Simplify right side
    868,456.40x = 583,289,992,356.72
  5. Step 5: Solve for x
    x = 583,289,992,356.72/868,456.40
  6. Step 6: Final answer
    x = 671,639.93

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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.