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Finding the Fourth Proportional to 561.52, 840.66 and 356.32

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Solution

The fourth proportional to 561.52, 840.66 and 356.32 is: 533.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.52 : 840.66 = 356.32 : x
  2. Step 2: Convert to fraction form
    561.52/840.66 = 356.32/x
  3. Step 3: Cross multiply
    561.52x = 840.66 × 356.32
  4. Step 4: Simplify right side
    561.52x = 299,543.97
  5. Step 5: Solve for x
    x = 299,543.97/561.52
  6. Step 6: Final answer
    x = 533.45

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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.