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Finding the Fourth Proportional to 263,438.60, 395,352.30 and 105,780.20

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Solution

The fourth proportional to 263,438.60, 395,352.30 and 105,780.20 is: 158,748.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,438.60 : 395,352.30 = 105,780.20 : x
  2. Step 2: Convert to fraction form
    263,438.60/395,352.30 = 105,780.20/x
  3. Step 3: Cross multiply
    263,438.60x = 395,352.30 × 105,780.20
  4. Step 4: Simplify right side
    263,438.60x = 41,820,445,364.46
  5. Step 5: Solve for x
    x = 41,820,445,364.46/263,438.60
  6. Step 6: Final answer
    x = 158,748.36

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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.