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Finding the Fourth Proportional to 1,020.67, 1,406.03 and 740.08

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Solution

The fourth proportional to 1,020.67, 1,406.03 and 740.08 is: 1,019.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.67 : 1,406.03 = 740.08 : x
  2. Step 2: Convert to fraction form
    1,020.67/1,406.03 = 740.08/x
  3. Step 3: Cross multiply
    1,020.67x = 1,406.03 × 740.08
  4. Step 4: Simplify right side
    1,020.67x = 1,040,570.98
  5. Step 5: Solve for x
    x = 1,040,570.98/1,020.67
  6. Step 6: Final answer
    x = 1,019.50

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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.