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Finding the Fourth Proportional to 260,422.94, 390,671.83 and 80,522.38

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Solution

The fourth proportional to 260,422.94, 390,671.83 and 80,522.38 is: 120,795.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,422.94 : 390,671.83 = 80,522.38 : x
  2. Step 2: Convert to fraction form
    260,422.94/390,671.83 = 80,522.38/x
  3. Step 3: Cross multiply
    260,422.94x = 390,671.83 × 80,522.38
  4. Step 4: Simplify right side
    260,422.94x = 31,457,826,139.55
  5. Step 5: Solve for x
    x = 31,457,826,139.55/260,422.94
  6. Step 6: Final answer
    x = 120,795.14

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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.