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Finding the Fourth Proportional to 609.68, 841.21 and 370.40

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Solution

The fourth proportional to 609.68, 841.21 and 370.40 is: 511.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.68 : 841.21 = 370.40 : x
  2. Step 2: Convert to fraction form
    609.68/841.21 = 370.40/x
  3. Step 3: Cross multiply
    609.68x = 841.21 × 370.40
  4. Step 4: Simplify right side
    609.68x = 311,587.35
  5. Step 5: Solve for x
    x = 311,587.35/609.68
  6. Step 6: Final answer
    x = 511.07

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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.