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Finding the Fourth Proportional to 545,288.90, 817,963.85 and 166,221.95

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Solution

The fourth proportional to 545,288.90, 817,963.85 and 166,221.95 is: 249,342.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,288.90 : 817,963.85 = 166,221.95 : x
  2. Step 2: Convert to fraction form
    545,288.90/817,963.85 = 166,221.95/x
  3. Step 3: Cross multiply
    545,288.90x = 817,963.85 × 166,221.95
  4. Step 4: Simplify right side
    545,288.90x = 135,963,542,502.24
  5. Step 5: Solve for x
    x = 135,963,542,502.24/545,288.90
  6. Step 6: Final answer
    x = 249,342.22

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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.