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Finding the Fourth Proportional to 1,071.36, 1,603.71 and 700.74

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Solution

The fourth proportional to 1,071.36, 1,603.71 and 700.74 is: 1,048.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.36 : 1,603.71 = 700.74 : x
  2. Step 2: Convert to fraction form
    1,071.36/1,603.71 = 700.74/x
  3. Step 3: Cross multiply
    1,071.36x = 1,603.71 × 700.74
  4. Step 4: Simplify right side
    1,071.36x = 1,123,783.75
  5. Step 5: Solve for x
    x = 1,123,783.75/1,071.36
  6. Step 6: Final answer
    x = 1,048.93

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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.