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Finding the Fourth Proportional to 399,418.04, 551,064.12 and 263,519.48

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Solution

The fourth proportional to 399,418.04, 551,064.12 and 263,519.48 is: 363,569.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,418.04 : 551,064.12 = 263,519.48 : x
  2. Step 2: Convert to fraction form
    399,418.04/551,064.12 = 263,519.48/x
  3. Step 3: Cross multiply
    399,418.04x = 551,064.12 × 263,519.48
  4. Step 4: Simplify right side
    399,418.04x = 145,216,130,349.06
  5. Step 5: Solve for x
    x = 145,216,130,349.06/399,418.04
  6. Step 6: Final answer
    x = 363,569.28

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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.