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Finding the Fourth Proportional to 4,827,689.78, 7,242,793.77 and 2,803,988.05

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Solution

The fourth proportional to 4,827,689.78, 7,242,793.77 and 2,803,988.05 is: 4,206,713.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,827,689.78 : 7,242,793.77 = 2,803,988.05 : x
  2. Step 2: Convert to fraction form
    4,827,689.78/7,242,793.77 = 2,803,988.05/x
  3. Step 3: Cross multiply
    4,827,689.78x = 7,242,793.77 × 2,803,988.05
  4. Step 4: Simplify right side
    4,827,689.78x = 20,308,707,172,102.42
  5. Step 5: Solve for x
    x = 20,308,707,172,102.42/4,827,689.78
  6. Step 6: Final answer
    x = 4,206,713.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.