Home / 1,069.32-1,475.66-621.28

Finding the Fourth Proportional to 1,069.32, 1,475.66 and 621.28

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Solution

The fourth proportional to 1,069.32, 1,475.66 and 621.28 is: 857.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.32 : 1,475.66 = 621.28 : x
  2. Step 2: Convert to fraction form
    1,069.32/1,475.66 = 621.28/x
  3. Step 3: Cross multiply
    1,069.32x = 1,475.66 × 621.28
  4. Step 4: Simplify right side
    1,069.32x = 916,795.91
  5. Step 5: Solve for x
    x = 916,795.91/1,069.32
  6. Step 6: Final answer
    x = 857.36

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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.