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Finding the Fourth Proportional to 991,372, 1,487,055.08 and 281,400.64

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Solution

The fourth proportional to 991,372, 1,487,055.08 and 281,400.64 is: 422,100.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,372 : 1,487,055.08 = 281,400.64 : x
  2. Step 2: Convert to fraction form
    991,372/1,487,055.08 = 281,400.64/x
  3. Step 3: Cross multiply
    991,372x = 1,487,055.08 × 281,400.64
  4. Step 4: Simplify right side
    991,372x = 418,458,251,227.25
  5. Step 5: Solve for x
    x = 418,458,251,227.25/991,372
  6. Step 6: Final answer
    x = 422,100.13

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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.