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Finding the Fourth Proportional to 1,729, 2,591.16 and 947.83

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Solution

The fourth proportional to 1,729, 2,591.16 and 947.83 is: 1,420.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729 : 2,591.16 = 947.83 : x
  2. Step 2: Convert to fraction form
    1,729/2,591.16 = 947.83/x
  3. Step 3: Cross multiply
    1,729x = 2,591.16 × 947.83
  4. Step 4: Simplify right side
    1,729x = 2,455,979.18
  5. Step 5: Solve for x
    x = 2,455,979.18/1,729
  6. Step 6: Final answer
    x = 1,420.46

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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.