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Finding the Fourth Proportional to 1,069.16, 1,603.74 and 637.16

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Solution

The fourth proportional to 1,069.16, 1,603.74 and 637.16 is: 955.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.16 : 1,603.74 = 637.16 : x
  2. Step 2: Convert to fraction form
    1,069.16/1,603.74 = 637.16/x
  3. Step 3: Cross multiply
    1,069.16x = 1,603.74 × 637.16
  4. Step 4: Simplify right side
    1,069.16x = 1,021,838.98
  5. Step 5: Solve for x
    x = 1,021,838.98/1,069.16
  6. Step 6: Final answer
    x = 955.74

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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.