Home / 280,434.18-386,997.08-153,109.78

Finding the Fourth Proportional to 280,434.18, 386,997.08 and 153,109.78

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Solution

The fourth proportional to 280,434.18, 386,997.08 and 153,109.78 is: 211,290.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,434.18 : 386,997.08 = 153,109.78 : x
  2. Step 2: Convert to fraction form
    280,434.18/386,997.08 = 153,109.78/x
  3. Step 3: Cross multiply
    280,434.18x = 386,997.08 × 153,109.78
  4. Step 4: Simplify right side
    280,434.18x = 59,253,036,046.40
  5. Step 5: Solve for x
    x = 59,253,036,046.40/280,434.18
  6. Step 6: Final answer
    x = 211,290.35

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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.