Home / 280,435.18-386,998.45-153,110.78

Finding the Fourth Proportional to 280,435.18, 386,998.45 and 153,110.78

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Solution

The fourth proportional to 280,435.18, 386,998.45 and 153,110.78 is: 211,291.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,435.18 : 386,998.45 = 153,110.78 : x
  2. Step 2: Convert to fraction form
    280,435.18/386,998.45 = 153,110.78/x
  3. Step 3: Cross multiply
    280,435.18x = 386,998.45 × 153,110.78
  4. Step 4: Simplify right side
    280,435.18x = 59,253,634,538.29
  5. Step 5: Solve for x
    x = 59,253,634,538.29/280,435.18
  6. Step 6: Final answer
    x = 211,291.73

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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.