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Finding the Fourth Proportional to 399,728.82, 551,866.05 and 249,029.94

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Solution

The fourth proportional to 399,728.82, 551,866.05 and 249,029.94 is: 343,811.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,728.82 : 551,866.05 = 249,029.94 : x
  2. Step 2: Convert to fraction form
    399,728.82/551,866.05 = 249,029.94/x
  3. Step 3: Cross multiply
    399,728.82x = 551,866.05 × 249,029.94
  4. Step 4: Simplify right side
    399,728.82x = 137,431,169,319.54
  5. Step 5: Solve for x
    x = 137,431,169,319.54/399,728.82
  6. Step 6: Final answer
    x = 343,811.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.