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Finding the Fourth Proportional to 448,781.90, 619,138.22 and 287,607.32

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Solution

The fourth proportional to 448,781.90, 619,138.22 and 287,607.32 is: 396,782.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,781.90 : 619,138.22 = 287,607.32 : x
  2. Step 2: Convert to fraction form
    448,781.90/619,138.22 = 287,607.32/x
  3. Step 3: Cross multiply
    448,781.90x = 619,138.22 × 287,607.32
  4. Step 4: Simplify right side
    448,781.90x = 178,068,684,163.77
  5. Step 5: Solve for x
    x = 178,068,684,163.77/448,781.90
  6. Step 6: Final answer
    x = 396,782.23

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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.