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Finding the Fourth Proportional to 602.19, 830.99 and 353.57

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Solution

The fourth proportional to 602.19, 830.99 and 353.57 is: 487.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.19 : 830.99 = 353.57 : x
  2. Step 2: Convert to fraction form
    602.19/830.99 = 353.57/x
  3. Step 3: Cross multiply
    602.19x = 830.99 × 353.57
  4. Step 4: Simplify right side
    602.19x = 293,816.76
  5. Step 5: Solve for x
    x = 293,816.76/602.19
  6. Step 6: Final answer
    x = 487.91

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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.