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Finding the Fourth Proportional to 572.42, 789.21 and 467.40

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Solution

The fourth proportional to 572.42, 789.21 and 467.40 is: 644.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.42 : 789.21 = 467.40 : x
  2. Step 2: Convert to fraction form
    572.42/789.21 = 467.40/x
  3. Step 3: Cross multiply
    572.42x = 789.21 × 467.40
  4. Step 4: Simplify right side
    572.42x = 368,879.71
  5. Step 5: Solve for x
    x = 368,879.71/572.42
  6. Step 6: Final answer
    x = 644.42

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.