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Finding the Fourth Proportional to 602.40, 831.40 and 353.63

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Solution

The fourth proportional to 602.40, 831.40 and 353.63 is: 488.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.40 : 831.40 = 353.63 : x
  2. Step 2: Convert to fraction form
    602.40/831.40 = 353.63/x
  3. Step 3: Cross multiply
    602.40x = 831.40 × 353.63
  4. Step 4: Simplify right side
    602.40x = 294,009.18
  5. Step 5: Solve for x
    x = 294,009.18/602.40
  6. Step 6: Final answer
    x = 488.06

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1.5x scale

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.