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Finding the Fourth Proportional to 774.56, 1,159.98 and 714.40

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Solution

The fourth proportional to 774.56, 1,159.98 and 714.40 is: 1,069.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.56 : 1,159.98 = 714.40 : x
  2. Step 2: Convert to fraction form
    774.56/1,159.98 = 714.40/x
  3. Step 3: Cross multiply
    774.56x = 1,159.98 × 714.40
  4. Step 4: Simplify right side
    774.56x = 828,689.71
  5. Step 5: Solve for x
    x = 828,689.71/774.56
  6. Step 6: Final answer
    x = 1,069.88

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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.