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Finding the Fourth Proportional to 280,015.83, 418,238.48 and 253,320.66

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Solution

The fourth proportional to 280,015.83, 418,238.48 and 253,320.66 is: 378,365.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,015.83 : 418,238.48 = 253,320.66 : x
  2. Step 2: Convert to fraction form
    280,015.83/418,238.48 = 253,320.66/x
  3. Step 3: Cross multiply
    280,015.83x = 418,238.48 × 253,320.66
  4. Step 4: Simplify right side
    280,015.83x = 105,948,446,524.39
  5. Step 5: Solve for x
    x = 105,948,446,524.39/280,015.83
  6. Step 6: Final answer
    x = 378,365.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.