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Finding the Fourth Proportional to 774.80, 1,068.92 and 526.32

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Solution

The fourth proportional to 774.80, 1,068.92 and 526.32 is: 726.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.80 : 1,068.92 = 526.32 : x
  2. Step 2: Convert to fraction form
    774.80/1,068.92 = 526.32/x
  3. Step 3: Cross multiply
    774.80x = 1,068.92 × 526.32
  4. Step 4: Simplify right side
    774.80x = 562,593.97
  5. Step 5: Solve for x
    x = 562,593.97/774.80
  6. Step 6: Final answer
    x = 726.12

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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.