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Finding the Fourth Proportional to 1,731.98, 2,390.21 and 946.08

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Solution

The fourth proportional to 1,731.98, 2,390.21 and 946.08 is: 1,305.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,731.98 : 2,390.21 = 946.08 : x
  2. Step 2: Convert to fraction form
    1,731.98/2,390.21 = 946.08/x
  3. Step 3: Cross multiply
    1,731.98x = 2,390.21 × 946.08
  4. Step 4: Simplify right side
    1,731.98x = 2,261,328.69
  5. Step 5: Solve for x
    x = 2,261,328.69/1,731.98
  6. Step 6: Final answer
    x = 1,305.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.