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Finding the Fourth Proportional to 315,040.32, 434,509.92 and 201,873.60

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Solution

The fourth proportional to 315,040.32, 434,509.92 and 201,873.60 is: 278,428.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,040.32 : 434,509.92 = 201,873.60 : x
  2. Step 2: Convert to fraction form
    315,040.32/434,509.92 = 201,873.60/x
  3. Step 3: Cross multiply
    315,040.32x = 434,509.92 × 201,873.60
  4. Step 4: Simplify right side
    315,040.32x = 87,716,081,786.11
  5. Step 5: Solve for x
    x = 87,716,081,786.11/315,040.32
  6. Step 6: Final answer
    x = 278,428.11

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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.