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Finding the Fourth Proportional to 1,156.68, 1,595.78 and 714.44

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Solution

The fourth proportional to 1,156.68, 1,595.78 and 714.44 is: 985.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.68 : 1,595.78 = 714.44 : x
  2. Step 2: Convert to fraction form
    1,156.68/1,595.78 = 714.44/x
  3. Step 3: Cross multiply
    1,156.68x = 1,595.78 × 714.44
  4. Step 4: Simplify right side
    1,156.68x = 1,140,089.06
  5. Step 5: Solve for x
    x = 1,140,089.06/1,156.68
  6. Step 6: Final answer
    x = 985.66

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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.