Home / 859,128.40-1,288,364.55-259,890.40

Finding the Fourth Proportional to 859,128.40, 1,288,364.55 and 259,890.40

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Solution

The fourth proportional to 859,128.40, 1,288,364.55 and 259,890.40 is: 389,736.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,128.40 : 1,288,364.55 = 259,890.40 : x
  2. Step 2: Convert to fraction form
    859,128.40/1,288,364.55 = 259,890.40/x
  3. Step 3: Cross multiply
    859,128.40x = 1,288,364.55 × 259,890.40
  4. Step 4: Simplify right side
    859,128.40x = 334,833,578,245.32
  5. Step 5: Solve for x
    x = 334,833,578,245.32/859,128.40
  6. Step 6: Final answer
    x = 389,736.36

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Double scale
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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.