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Finding the Fourth Proportional to 561.76, 838.72 and 484.64

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Solution

The fourth proportional to 561.76, 838.72 and 484.64 is: 723.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.76 : 838.72 = 484.64 : x
  2. Step 2: Convert to fraction form
    561.76/838.72 = 484.64/x
  3. Step 3: Cross multiply
    561.76x = 838.72 × 484.64
  4. Step 4: Simplify right side
    561.76x = 406,477.26
  5. Step 5: Solve for x
    x = 406,477.26/561.76
  6. Step 6: Final answer
    x = 723.58

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.