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Finding the Fourth Proportional to 745.62, 1,113.41 and 608.93

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Solution

The fourth proportional to 745.62, 1,113.41 and 608.93 is: 909.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.62 : 1,113.41 = 608.93 : x
  2. Step 2: Convert to fraction form
    745.62/1,113.41 = 608.93/x
  3. Step 3: Cross multiply
    745.62x = 1,113.41 × 608.93
  4. Step 4: Simplify right side
    745.62x = 677,988.49
  5. Step 5: Solve for x
    x = 677,988.49/745.62
  6. Step 6: Final answer
    x = 909.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.