Home / 312,147.28-430,688.32-189,637.20

Finding the Fourth Proportional to 312,147.28, 430,688.32 and 189,637.20

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Solution

The fourth proportional to 312,147.28, 430,688.32 and 189,637.20 is: 261,653.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,147.28 : 430,688.32 = 189,637.20 : x
  2. Step 2: Convert to fraction form
    312,147.28/430,688.32 = 189,637.20/x
  3. Step 3: Cross multiply
    312,147.28x = 430,688.32 × 189,637.20
  4. Step 4: Simplify right side
    312,147.28x = 81,674,527,077.50
  5. Step 5: Solve for x
    x = 81,674,527,077.50/312,147.28
  6. Step 6: Final answer
    x = 261,653.82

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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.