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Finding the Fourth Proportional to 672.89, 928.44 and 424.26

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Solution

The fourth proportional to 672.89, 928.44 and 424.26 is: 585.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.89 : 928.44 = 424.26 : x
  2. Step 2: Convert to fraction form
    672.89/928.44 = 424.26/x
  3. Step 3: Cross multiply
    672.89x = 928.44 × 424.26
  4. Step 4: Simplify right side
    672.89x = 393,899.95
  5. Step 5: Solve for x
    x = 393,899.95/672.89
  6. Step 6: Final answer
    x = 585.39

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.