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Finding the Fourth Proportional to 1,786, 2,461.96 and 1,536

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Solution

The fourth proportional to 1,786, 2,461.96 and 1,536 is: 2,117.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786 : 2,461.96 = 1,536 : x
  2. Step 2: Convert to fraction form
    1,786/2,461.96 = 1,536/x
  3. Step 3: Cross multiply
    1,786x = 2,461.96 × 1,536
  4. Step 4: Simplify right side
    1,786x = 3,781,570.56
  5. Step 5: Solve for x
    x = 3,781,570.56/1,786
  6. Step 6: Final answer
    x = 2,117.34

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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.