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Finding the Fourth Proportional to 263,416, 395,158.72 and 85,860.80

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Solution

The fourth proportional to 263,416, 395,158.72 and 85,860.80 is: 128,802.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,416 : 395,158.72 = 85,860.80 : x
  2. Step 2: Convert to fraction form
    263,416/395,158.72 = 85,860.80/x
  3. Step 3: Cross multiply
    263,416x = 395,158.72 × 85,860.80
  4. Step 4: Simplify right side
    263,416x = 33,928,643,826.18
  5. Step 5: Solve for x
    x = 33,928,643,826.18/263,416
  6. Step 6: Final answer
    x = 128,802.52

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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.