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Finding the Fourth Proportional to 1,186.96, 1,637.82 and 714.82

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Solution

The fourth proportional to 1,186.96, 1,637.82 and 714.82 is: 986.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.96 : 1,637.82 = 714.82 : x
  2. Step 2: Convert to fraction form
    1,186.96/1,637.82 = 714.82/x
  3. Step 3: Cross multiply
    1,186.96x = 1,637.82 × 714.82
  4. Step 4: Simplify right side
    1,186.96x = 1,170,746.49
  5. Step 5: Solve for x
    x = 1,170,746.49/1,186.96
  6. Step 6: Final answer
    x = 986.34

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1.5x scale

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.