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Finding the Fourth Proportional to 745.51, 1,118.30 and 283.22

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Solution

The fourth proportional to 745.51, 1,118.30 and 283.22 is: 424.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.51 : 1,118.30 = 283.22 : x
  2. Step 2: Convert to fraction form
    745.51/1,118.30 = 283.22/x
  3. Step 3: Cross multiply
    745.51x = 1,118.30 × 283.22
  4. Step 4: Simplify right side
    745.51x = 316,723.71
  5. Step 5: Solve for x
    x = 316,723.71/745.51
  6. Step 6: Final answer
    x = 424.84

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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.