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Finding the Fourth Proportional to 890,765.80, 1,336,019.10 and 259,613.80

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Solution

The fourth proportional to 890,765.80, 1,336,019.10 and 259,613.80 is: 389,382.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,765.80 : 1,336,019.10 = 259,613.80 : x
  2. Step 2: Convert to fraction form
    890,765.80/1,336,019.10 = 259,613.80/x
  3. Step 3: Cross multiply
    890,765.80x = 1,336,019.10 × 259,613.80
  4. Step 4: Simplify right side
    890,765.80x = 346,848,995,423.58
  5. Step 5: Solve for x
    x = 346,848,995,423.58/890,765.80
  6. Step 6: Final answer
    x = 389,382.93

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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.