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Finding the Fourth Proportional to 5,275,391.82, 7,911,979.92 and 1,487,988.96

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Solution

The fourth proportional to 5,275,391.82, 7,911,979.92 and 1,487,988.96 is: 2,231,670.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,275,391.82 : 7,911,979.92 = 1,487,988.96 : x
  2. Step 2: Convert to fraction form
    5,275,391.82/7,911,979.92 = 1,487,988.96/x
  3. Step 3: Cross multiply
    5,275,391.82x = 7,911,979.92 × 1,487,988.96
  4. Step 4: Simplify right side
    5,275,391.82x = 11,772,938,772,701.68
  5. Step 5: Solve for x
    x = 11,772,938,772,701.68/5,275,391.82
  6. Step 6: Final answer
    x = 2,231,670.97

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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.