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Finding the Fourth Proportional to 319,515.60, 479,273.40 and 97,870.80

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Solution

The fourth proportional to 319,515.60, 479,273.40 and 97,870.80 is: 146,806.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,515.60 : 479,273.40 = 97,870.80 : x
  2. Step 2: Convert to fraction form
    319,515.60/479,273.40 = 97,870.80/x
  3. Step 3: Cross multiply
    319,515.60x = 479,273.40 × 97,870.80
  4. Step 4: Simplify right side
    319,515.60x = 46,906,871,076.72
  5. Step 5: Solve for x
    x = 46,906,871,076.72/319,515.60
  6. Step 6: Final answer
    x = 146,806.20

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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.