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Finding the Fourth Proportional to 672.50, 928.48 and 548.45

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Solution

The fourth proportional to 672.50, 928.48 and 548.45 is: 757.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.50 : 928.48 = 548.45 : x
  2. Step 2: Convert to fraction form
    672.50/928.48 = 548.45/x
  3. Step 3: Cross multiply
    672.50x = 928.48 × 548.45
  4. Step 4: Simplify right side
    672.50x = 509,224.86
  5. Step 5: Solve for x
    x = 509,224.86/672.50
  6. Step 6: Final answer
    x = 757.21

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1.5x scale

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.