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Finding the Fourth Proportional to 1,033.58, 1,425.55 and 718.84

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Solution

The fourth proportional to 1,033.58, 1,425.55 and 718.84 is: 991.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,033.58 : 1,425.55 = 718.84 : x
  2. Step 2: Convert to fraction form
    1,033.58/1,425.55 = 718.84/x
  3. Step 3: Cross multiply
    1,033.58x = 1,425.55 × 718.84
  4. Step 4: Simplify right side
    1,033.58x = 1,024,743.69
  5. Step 5: Solve for x
    x = 1,024,743.69/1,033.58
  6. Step 6: Final answer
    x = 991.45

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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.