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Finding the Fourth Proportional to 871,869.42, 1,203,287.40 and 489,888

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Solution

The fourth proportional to 871,869.42, 1,203,287.40 and 489,888 is: 676,105.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,869.42 : 1,203,287.40 = 489,888 : x
  2. Step 2: Convert to fraction form
    871,869.42/1,203,287.40 = 489,888/x
  3. Step 3: Cross multiply
    871,869.42x = 1,203,287.40 × 489,888
  4. Step 4: Simplify right side
    871,869.42x = 589,476,057,811.20
  5. Step 5: Solve for x
    x = 589,476,057,811.20/871,869.42
  6. Step 6: Final answer
    x = 676,105.90

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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.