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Finding the Fourth Proportional to 602.12, 830.85 and 340.09

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Solution

The fourth proportional to 602.12, 830.85 and 340.09 is: 469.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.12 : 830.85 = 340.09 : x
  2. Step 2: Convert to fraction form
    602.12/830.85 = 340.09/x
  3. Step 3: Cross multiply
    602.12x = 830.85 × 340.09
  4. Step 4: Simplify right side
    602.12x = 282,563.78
  5. Step 5: Solve for x
    x = 282,563.78/602.12
  6. Step 6: Final answer
    x = 469.28

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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.