Home / 858,898.40-1,288,019.55-259,660.40

Finding the Fourth Proportional to 858,898.40, 1,288,019.55 and 259,660.40

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Solution

The fourth proportional to 858,898.40, 1,288,019.55 and 259,660.40 is: 389,391.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,898.40 : 1,288,019.55 = 259,660.40 : x
  2. Step 2: Convert to fraction form
    858,898.40/1,288,019.55 = 259,660.40/x
  3. Step 3: Cross multiply
    858,898.40x = 1,288,019.55 × 259,660.40
  4. Step 4: Simplify right side
    858,898.40x = 334,447,671,560.82
  5. Step 5: Solve for x
    x = 334,447,671,560.82/858,898.40
  6. Step 6: Final answer
    x = 389,391.42

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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.