Home / 858,705.10-1,288,057.65-259,758.70

Finding the Fourth Proportional to 858,705.10, 1,288,057.65 and 259,758.70

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Solution

The fourth proportional to 858,705.10, 1,288,057.65 and 259,758.70 is: 389,638.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,705.10 : 1,288,057.65 = 259,758.70 : x
  2. Step 2: Convert to fraction form
    858,705.10/1,288,057.65 = 259,758.70/x
  3. Step 3: Cross multiply
    858,705.10x = 1,288,057.65 × 259,758.70
  4. Step 4: Simplify right side
    858,705.10x = 334,584,180,689.06
  5. Step 5: Solve for x
    x = 334,584,180,689.06/858,705.10
  6. Step 6: Final answer
    x = 389,638.05

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Similar ratio
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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.