Home / 858,971.40-1,288,129.05-259,733.40

Finding the Fourth Proportional to 858,971.40, 1,288,129.05 and 259,733.40

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Solution

The fourth proportional to 858,971.40, 1,288,129.05 and 259,733.40 is: 389,500.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,971.40 : 1,288,129.05 = 259,733.40 : x
  2. Step 2: Convert to fraction form
    858,971.40/1,288,129.05 = 259,733.40/x
  3. Step 3: Cross multiply
    858,971.40x = 1,288,129.05 × 259,733.40
  4. Step 4: Simplify right side
    858,971.40x = 334,570,137,795.27
  5. Step 5: Solve for x
    x = 334,570,137,795.27/858,971.40
  6. Step 6: Final answer
    x = 389,500.91

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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.