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Finding the Fourth Proportional to 745.36, 1,117.65 and 349.62

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Solution

The fourth proportional to 745.36, 1,117.65 and 349.62 is: 524.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.36 : 1,117.65 = 349.62 : x
  2. Step 2: Convert to fraction form
    745.36/1,117.65 = 349.62/x
  3. Step 3: Cross multiply
    745.36x = 1,117.65 × 349.62
  4. Step 4: Simplify right side
    745.36x = 390,752.79
  5. Step 5: Solve for x
    x = 390,752.79/745.36
  6. Step 6: Final answer
    x = 524.25

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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.