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Finding the Fourth Proportional to 399,636.80, 598,938.45 and 299,007.45

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Solution

The fourth proportional to 399,636.80, 598,938.45 and 299,007.45 is: 448,124.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,636.80 : 598,938.45 = 299,007.45 : x
  2. Step 2: Convert to fraction form
    399,636.80/598,938.45 = 299,007.45/x
  3. Step 3: Cross multiply
    399,636.80x = 598,938.45 × 299,007.45
  4. Step 4: Simplify right side
    399,636.80x = 179,087,058,641.45
  5. Step 5: Solve for x
    x = 179,087,058,641.45/399,636.80
  6. Step 6: Final answer
    x = 448,124.55

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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.