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Finding the Fourth Proportional to 494,838.60, 742,695.30 and 423,979.80

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Solution

The fourth proportional to 494,838.60, 742,695.30 and 423,979.80 is: 636,344.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,838.60 : 742,695.30 = 423,979.80 : x
  2. Step 2: Convert to fraction form
    494,838.60/742,695.30 = 423,979.80/x
  3. Step 3: Cross multiply
    494,838.60x = 742,695.30 × 423,979.80
  4. Step 4: Simplify right side
    494,838.60x = 314,887,804,754.94
  5. Step 5: Solve for x
    x = 314,887,804,754.94/494,838.60
  6. Step 6: Final answer
    x = 636,344.47

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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.