Home / 871,280.20-1,306,985.10-310,241.80

Finding the Fourth Proportional to 871,280.20, 1,306,985.10 and 310,241.80

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Solution

The fourth proportional to 871,280.20, 1,306,985.10 and 310,241.80 is: 465,385.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,280.20 : 1,306,985.10 = 310,241.80 : x
  2. Step 2: Convert to fraction form
    871,280.20/1,306,985.10 = 310,241.80/x
  3. Step 3: Cross multiply
    871,280.20x = 1,306,985.10 × 310,241.80
  4. Step 4: Simplify right side
    871,280.20x = 405,481,409,997.18
  5. Step 5: Solve for x
    x = 405,481,409,997.18/871,280.20
  6. Step 6: Final answer
    x = 465,385.77

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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.