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Finding the Fourth Proportional to 991,379, 1,487,065.58 and 281,407.64

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Solution

The fourth proportional to 991,379, 1,487,065.58 and 281,407.64 is: 422,110.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,379 : 1,487,065.58 = 281,407.64 : x
  2. Step 2: Convert to fraction form
    991,379/1,487,065.58 = 281,407.64/x
  3. Step 3: Cross multiply
    991,379x = 1,487,065.58 × 281,407.64
  4. Step 4: Simplify right side
    991,379x = 418,471,615,393.03
  5. Step 5: Solve for x
    x = 418,471,615,393.03/991,379
  6. Step 6: Final answer
    x = 422,110.63

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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.