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Finding the Fourth Proportional to 561.04, 840.56 and 479.05

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Solution

The fourth proportional to 561.04, 840.56 and 479.05 is: 717.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.04 : 840.56 = 479.05 : x
  2. Step 2: Convert to fraction form
    561.04/840.56 = 479.05/x
  3. Step 3: Cross multiply
    561.04x = 840.56 × 479.05
  4. Step 4: Simplify right side
    561.04x = 402,670.27
  5. Step 5: Solve for x
    x = 402,670.27/561.04
  6. Step 6: Final answer
    x = 717.72

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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.