Home / 399,929.40-551,415.60-376,747.20

Finding the Fourth Proportional to 399,929.40, 551,415.60 and 376,747.20

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Solution

The fourth proportional to 399,929.40, 551,415.60 and 376,747.20 is: 519,452.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,929.40 : 551,415.60 = 376,747.20 : x
  2. Step 2: Convert to fraction form
    399,929.40/551,415.60 = 376,747.20/x
  3. Step 3: Cross multiply
    399,929.40x = 551,415.60 × 376,747.20
  4. Step 4: Simplify right side
    399,929.40x = 207,744,283,336.32
  5. Step 5: Solve for x
    x = 207,744,283,336.32/399,929.40
  6. Step 6: Final answer
    x = 519,452.39

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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.