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Finding the Fourth Proportional to 399,419.04, 551,065.50 and 263,520.48

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Solution

The fourth proportional to 399,419.04, 551,065.50 and 263,520.48 is: 363,570.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,419.04 : 551,065.50 = 263,520.48 : x
  2. Step 2: Convert to fraction form
    399,419.04/551,065.50 = 263,520.48/x
  3. Step 3: Cross multiply
    399,419.04x = 551,065.50 × 263,520.48
  4. Step 4: Simplify right side
    399,419.04x = 145,217,045,071.44
  5. Step 5: Solve for x
    x = 145,217,045,071.44/399,419.04
  6. Step 6: Final answer
    x = 363,570.66

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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.