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Finding the Fourth Proportional to 871,803.80, 1,307,705.70 and 763,328.60

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Solution

The fourth proportional to 871,803.80, 1,307,705.70 and 763,328.60 is: 1,144,992.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,803.80 : 1,307,705.70 = 763,328.60 : x
  2. Step 2: Convert to fraction form
    871,803.80/1,307,705.70 = 763,328.60/x
  3. Step 3: Cross multiply
    871,803.80x = 1,307,705.70 × 763,328.60
  4. Step 4: Simplify right side
    871,803.80x = 998,209,161,193.02
  5. Step 5: Solve for x
    x = 998,209,161,193.02/871,803.80
  6. Step 6: Final answer
    x = 1,144,992.90

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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.