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Finding the Fourth Proportional to 991,371, 1,487,053.58 and 281,399.64

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Solution

The fourth proportional to 991,371, 1,487,053.58 and 281,399.64 is: 422,098.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,371 : 1,487,053.58 = 281,399.64 : x
  2. Step 2: Convert to fraction form
    991,371/1,487,053.58 = 281,399.64/x
  3. Step 3: Cross multiply
    991,371x = 1,487,053.58 × 281,399.64
  4. Step 4: Simplify right side
    991,371x = 418,456,342,072.71
  5. Step 5: Solve for x
    x = 418,456,342,072.71/991,371
  6. Step 6: Final answer
    x = 422,098.63

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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.