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Finding the Fourth Proportional to 775.29, 1,069.58 and 464.79

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Solution

The fourth proportional to 775.29, 1,069.58 and 464.79 is: 641.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.29 : 1,069.58 = 464.79 : x
  2. Step 2: Convert to fraction form
    775.29/1,069.58 = 464.79/x
  3. Step 3: Cross multiply
    775.29x = 1,069.58 × 464.79
  4. Step 4: Simplify right side
    775.29x = 497,127.76
  5. Step 5: Solve for x
    x = 497,127.76/775.29
  6. Step 6: Final answer
    x = 641.22

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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.