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Finding the Fourth Proportional to 810,168.40, 1,211,753.40 and 684,197.20

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Solution

The fourth proportional to 810,168.40, 1,211,753.40 and 684,197.20 is: 1,023,340.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,168.40 : 1,211,753.40 = 684,197.20 : x
  2. Step 2: Convert to fraction form
    810,168.40/1,211,753.40 = 684,197.20/x
  3. Step 3: Cross multiply
    810,168.40x = 1,211,753.40 × 684,197.20
  4. Step 4: Simplify right side
    810,168.40x = 829,078,283,370.48
  5. Step 5: Solve for x
    x = 829,078,283,370.48/810,168.40
  6. Step 6: Final answer
    x = 1,023,340.68

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1.5x scale

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.