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Finding the Fourth Proportional to 721,780.14, 996,044.52 and 399,483.37

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Solution

The fourth proportional to 721,780.14, 996,044.52 and 399,483.37 is: 551,280.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,780.14 : 996,044.52 = 399,483.37 : x
  2. Step 2: Convert to fraction form
    721,780.14/996,044.52 = 399,483.37/x
  3. Step 3: Cross multiply
    721,780.14x = 996,044.52 × 399,483.37
  4. Step 4: Simplify right side
    721,780.14x = 397,903,221,519.63
  5. Step 5: Solve for x
    x = 397,903,221,519.63/721,780.14
  6. Step 6: Final answer
    x = 551,280.37

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1.5x scale

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.