Home / 280,465.30-386,576.06-198,688.62

Finding the Fourth Proportional to 280,465.30, 386,576.06 and 198,688.62

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Solution

The fourth proportional to 280,465.30, 386,576.06 and 198,688.62 is: 273,860.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,465.30 : 386,576.06 = 198,688.62 : x
  2. Step 2: Convert to fraction form
    280,465.30/386,576.06 = 198,688.62/x
  3. Step 3: Cross multiply
    280,465.30x = 386,576.06 × 198,688.62
  4. Step 4: Simplify right side
    280,465.30x = 76,808,263,886.44
  5. Step 5: Solve for x
    x = 76,808,263,886.44/280,465.30
  6. Step 6: Final answer
    x = 273,860.13

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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.