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Finding the Fourth Proportional to 672.96, 928.80 and 554.16

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Solution

The fourth proportional to 672.96, 928.80 and 554.16 is: 764.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.96 : 928.80 = 554.16 : x
  2. Step 2: Convert to fraction form
    672.96/928.80 = 554.16/x
  3. Step 3: Cross multiply
    672.96x = 928.80 × 554.16
  4. Step 4: Simplify right side
    672.96x = 514,703.81
  5. Step 5: Solve for x
    x = 514,703.81/672.96
  6. Step 6: Final answer
    x = 764.84

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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.