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Finding the Fourth Proportional to 908,614.95, 1,361,446.20 and 781,659.60

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Solution

The fourth proportional to 908,614.95, 1,361,446.20 and 781,659.60 is: 1,171,219.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,614.95 : 1,361,446.20 = 781,659.60 : x
  2. Step 2: Convert to fraction form
    908,614.95/1,361,446.20 = 781,659.60/x
  3. Step 3: Cross multiply
    908,614.95x = 1,361,446.20 × 781,659.60
  4. Step 4: Simplify right side
    908,614.95x = 1,064,187,492,113.52
  5. Step 5: Solve for x
    x = 1,064,187,492,113.52/908,614.95
  6. Step 6: Final answer
    x = 1,171,219.44

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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.