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Finding the Fourth Proportional to 561.48, 840.80 and 469.95

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Solution

The fourth proportional to 561.48, 840.80 and 469.95 is: 703.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.48 : 840.80 = 469.95 : x
  2. Step 2: Convert to fraction form
    561.48/840.80 = 469.95/x
  3. Step 3: Cross multiply
    561.48x = 840.80 × 469.95
  4. Step 4: Simplify right side
    561.48x = 395,133.96
  5. Step 5: Solve for x
    x = 395,133.96/561.48
  6. Step 6: Final answer
    x = 703.74

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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.