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Finding the Fourth Proportional to 868,608.72, 1,302,707.16 and 489,697.20

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Solution

The fourth proportional to 868,608.72, 1,302,707.16 and 489,697.20 is: 734,429.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,608.72 : 1,302,707.16 = 489,697.20 : x
  2. Step 2: Convert to fraction form
    868,608.72/1,302,707.16 = 489,697.20/x
  3. Step 3: Cross multiply
    868,608.72x = 1,302,707.16 × 489,697.20
  4. Step 4: Simplify right side
    868,608.72x = 637,932,048,671.95
  5. Step 5: Solve for x
    x = 637,932,048,671.95/868,608.72
  6. Step 6: Final answer
    x = 734,429.71

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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.