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Finding the Fourth Proportional to 871,307.80, 1,306,961.70 and 808,322.20

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Solution

The fourth proportional to 871,307.80, 1,306,961.70 and 808,322.20 is: 1,212,483.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,307.80 : 1,306,961.70 = 808,322.20 : x
  2. Step 2: Convert to fraction form
    871,307.80/1,306,961.70 = 808,322.20/x
  3. Step 3: Cross multiply
    871,307.80x = 1,306,961.70 × 808,322.20
  4. Step 4: Simplify right side
    871,307.80x = 1,056,446,156,659.74
  5. Step 5: Solve for x
    x = 1,056,446,156,659.74/871,307.80
  6. Step 6: Final answer
    x = 1,212,483.30

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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.