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Finding the Fourth Proportional to 775.64, 1,069.13 and 526.84

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Solution

The fourth proportional to 775.64, 1,069.13 and 526.84 is: 726.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.64 : 1,069.13 = 526.84 : x
  2. Step 2: Convert to fraction form
    775.64/1,069.13 = 526.84/x
  3. Step 3: Cross multiply
    775.64x = 1,069.13 × 526.84
  4. Step 4: Simplify right side
    775.64x = 563,259.09
  5. Step 5: Solve for x
    x = 563,259.09/775.64
  6. Step 6: Final answer
    x = 726.18

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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.