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Finding the Fourth Proportional to 493.36, 740.03 and 128.14

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Solution

The fourth proportional to 493.36, 740.03 and 128.14 is: 192.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.36 : 740.03 = 128.14 : x
  2. Step 2: Convert to fraction form
    493.36/740.03 = 128.14/x
  3. Step 3: Cross multiply
    493.36x = 740.03 × 128.14
  4. Step 4: Simplify right side
    493.36x = 94,831.40
  5. Step 5: Solve for x
    x = 94,831.40/493.36
  6. Step 6: Final answer
    x = 192.22

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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.