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Finding the Fourth Proportional to 561.18, 840.34 and 469.64

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Solution

The fourth proportional to 561.18, 840.34 and 469.64 is: 703.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.18 : 840.34 = 469.64 : x
  2. Step 2: Convert to fraction form
    561.18/840.34 = 469.64/x
  3. Step 3: Cross multiply
    561.18x = 840.34 × 469.64
  4. Step 4: Simplify right side
    561.18x = 394,657.28
  5. Step 5: Solve for x
    x = 394,657.28/561.18
  6. Step 6: Final answer
    x = 703.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.