Home / 858,956.40-1,288,106.55-259,718.40

Finding the Fourth Proportional to 858,956.40, 1,288,106.55 and 259,718.40

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Solution

The fourth proportional to 858,956.40, 1,288,106.55 and 259,718.40 is: 389,478.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,956.40 : 1,288,106.55 = 259,718.40 : x
  2. Step 2: Convert to fraction form
    858,956.40/1,288,106.55 = 259,718.40/x
  3. Step 3: Cross multiply
    858,956.40x = 1,288,106.55 × 259,718.40
  4. Step 4: Simplify right side
    858,956.40x = 334,544,972,195.52
  5. Step 5: Solve for x
    x = 334,544,972,195.52/858,956.40
  6. Step 6: Final answer
    x = 389,478.41

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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.