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Finding the Fourth Proportional to 602.36, 831.26 and 340.40

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Solution

The fourth proportional to 602.36, 831.26 and 340.40 is: 469.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.36 : 831.26 = 340.40 : x
  2. Step 2: Convert to fraction form
    602.36/831.26 = 340.40/x
  3. Step 3: Cross multiply
    602.36x = 831.26 × 340.40
  4. Step 4: Simplify right side
    602.36x = 282,960.90
  5. Step 5: Solve for x
    x = 282,960.90/602.36
  6. Step 6: Final answer
    x = 469.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.