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Finding the Fourth Proportional to 609.10, 840.42 and 360.32

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Solution

The fourth proportional to 609.10, 840.42 and 360.32 is: 497.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.10 : 840.42 = 360.32 : x
  2. Step 2: Convert to fraction form
    609.10/840.42 = 360.32/x
  3. Step 3: Cross multiply
    609.10x = 840.42 × 360.32
  4. Step 4: Simplify right side
    609.10x = 302,820.13
  5. Step 5: Solve for x
    x = 302,820.13/609.10
  6. Step 6: Final answer
    x = 497.16

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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.