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Finding the Fourth Proportional to 407.32, 561.88 and 296.64

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Solution

The fourth proportional to 407.32, 561.88 and 296.64 is: 409.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.32 : 561.88 = 296.64 : x
  2. Step 2: Convert to fraction form
    407.32/561.88 = 296.64/x
  3. Step 3: Cross multiply
    407.32x = 561.88 × 296.64
  4. Step 4: Simplify right side
    407.32x = 166,676.08
  5. Step 5: Solve for x
    x = 166,676.08/407.32
  6. Step 6: Final answer
    x = 409.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.