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Finding the Fourth Proportional to 486,994.40, 672,119.08 and 280,258.56

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Solution

The fourth proportional to 486,994.40, 672,119.08 and 280,258.56 is: 386,795.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,994.40 : 672,119.08 = 280,258.56 : x
  2. Step 2: Convert to fraction form
    486,994.40/672,119.08 = 280,258.56/x
  3. Step 3: Cross multiply
    486,994.40x = 672,119.08 × 280,258.56
  4. Step 4: Simplify right side
    486,994.40x = 188,367,125,509.33
  5. Step 5: Solve for x
    x = 188,367,125,509.33/486,994.40
  6. Step 6: Final answer
    x = 386,795.26

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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.