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Finding the Fourth Proportional to 620,648.10, 930,972.15 and 384,452.10

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Solution

The fourth proportional to 620,648.10, 930,972.15 and 384,452.10 is: 576,678.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,648.10 : 930,972.15 = 384,452.10 : x
  2. Step 2: Convert to fraction form
    620,648.10/930,972.15 = 384,452.10/x
  3. Step 3: Cross multiply
    620,648.10x = 930,972.15 × 384,452.10
  4. Step 4: Simplify right side
    620,648.10x = 357,914,198,109.02
  5. Step 5: Solve for x
    x = 357,914,198,109.02/620,648.10
  6. Step 6: Final answer
    x = 576,678.15

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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.