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Finding the Fourth Proportional to 1,074.03, 1,607.40 and 663.45

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Solution

The fourth proportional to 1,074.03, 1,607.40 and 663.45 is: 992.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,074.03 : 1,607.40 = 663.45 : x
  2. Step 2: Convert to fraction form
    1,074.03/1,607.40 = 663.45/x
  3. Step 3: Cross multiply
    1,074.03x = 1,607.40 × 663.45
  4. Step 4: Simplify right side
    1,074.03x = 1,066,429.53
  5. Step 5: Solve for x
    x = 1,066,429.53/1,074.03
  6. Step 6: Final answer
    x = 992.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.