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Finding the Fourth Proportional to 545,145.21, 817,885.31 and 279,092.48

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Solution

The fourth proportional to 545,145.21, 817,885.31 and 279,092.48 is: 418,724.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,145.21 : 817,885.31 = 279,092.48 : x
  2. Step 2: Convert to fraction form
    545,145.21/817,885.31 = 279,092.48/x
  3. Step 3: Cross multiply
    545,145.21x = 817,885.31 × 279,092.48
  4. Step 4: Simplify right side
    545,145.21x = 228,265,634,038.58
  5. Step 5: Solve for x
    x = 228,265,634,038.58/545,145.21
  6. Step 6: Final answer
    x = 418,724.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.