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Finding the Fourth Proportional to 609.45, 841.05 and 357.45

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Solution

The fourth proportional to 609.45, 841.05 and 357.45 is: 493.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.45 : 841.05 = 357.45 : x
  2. Step 2: Convert to fraction form
    609.45/841.05 = 357.45/x
  3. Step 3: Cross multiply
    609.45x = 841.05 × 357.45
  4. Step 4: Simplify right side
    609.45x = 300,633.32
  5. Step 5: Solve for x
    x = 300,633.32/609.45
  6. Step 6: Final answer
    x = 493.29

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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.