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Finding the Fourth Proportional to 920.04, 1,380.04 and 432.75

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Solution

The fourth proportional to 920.04, 1,380.04 and 432.75 is: 649.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.04 : 1,380.04 = 432.75 : x
  2. Step 2: Convert to fraction form
    920.04/1,380.04 = 432.75/x
  3. Step 3: Cross multiply
    920.04x = 1,380.04 × 432.75
  4. Step 4: Simplify right side
    920.04x = 597,212.31
  5. Step 5: Solve for x
    x = 597,212.31/920.04
  6. Step 6: Final answer
    x = 649.12

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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.