Home / 871,310.40-1,306,965.60-658,420.80

Finding the Fourth Proportional to 871,310.40, 1,306,965.60 and 658,420.80

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Solution

The fourth proportional to 871,310.40, 1,306,965.60 and 658,420.80 is: 987,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,310.40 : 1,306,965.60 = 658,420.80 : x
  2. Step 2: Convert to fraction form
    871,310.40/1,306,965.60 = 658,420.80/x
  3. Step 3: Cross multiply
    871,310.40x = 1,306,965.60 × 658,420.80
  4. Step 4: Simplify right side
    871,310.40x = 860,533,335,924.48
  5. Step 5: Solve for x
    x = 860,533,335,924.48/871,310.40
  6. Step 6: Final answer
    x = 987,631.20

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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.