Home / 312,139.06-430,760.56-189,590.04

Finding the Fourth Proportional to 312,139.06, 430,760.56 and 189,590.04

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Solution

The fourth proportional to 312,139.06, 430,760.56 and 189,590.04 is: 261,639.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,139.06 : 430,760.56 = 189,590.04 : x
  2. Step 2: Convert to fraction form
    312,139.06/430,760.56 = 189,590.04/x
  3. Step 3: Cross multiply
    312,139.06x = 430,760.56 × 189,590.04
  4. Step 4: Simplify right side
    312,139.06x = 81,667,911,800.82
  5. Step 5: Solve for x
    x = 81,667,911,800.82/312,139.06
  6. Step 6: Final answer
    x = 261,639.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.