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Finding the Fourth Proportional to 1,069.74, 1,476.33 and 738.35

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Solution

The fourth proportional to 1,069.74, 1,476.33 and 738.35 is: 1,018.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.74 : 1,476.33 = 738.35 : x
  2. Step 2: Convert to fraction form
    1,069.74/1,476.33 = 738.35/x
  3. Step 3: Cross multiply
    1,069.74x = 1,476.33 × 738.35
  4. Step 4: Simplify right side
    1,069.74x = 1,090,043.64
  5. Step 5: Solve for x
    x = 1,090,043.64/1,069.74
  6. Step 6: Final answer
    x = 1,018.98

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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.