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Finding the Fourth Proportional to 545,140.71, 817,878.56 and 279,087.98

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Solution

The fourth proportional to 545,140.71, 817,878.56 and 279,087.98 is: 418,717.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,140.71 : 817,878.56 = 279,087.98 : x
  2. Step 2: Convert to fraction form
    545,140.71/817,878.56 = 279,087.98/x
  3. Step 3: Cross multiply
    545,140.71x = 817,878.56 × 279,087.98
  4. Step 4: Simplify right side
    545,140.71x = 228,260,069,710.88
  5. Step 5: Solve for x
    x = 228,260,069,710.88/545,140.71
  6. Step 6: Final answer
    x = 418,717.71

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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.