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Finding the Fourth Proportional to 667,774.89, 921,427.42 and 377,280.46

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Solution

The fourth proportional to 667,774.89, 921,427.42 and 377,280.46 is: 520,589.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,774.89 : 921,427.42 = 377,280.46 : x
  2. Step 2: Convert to fraction form
    667,774.89/921,427.42 = 377,280.46/x
  3. Step 3: Cross multiply
    667,774.89x = 921,427.42 × 377,280.46
  4. Step 4: Simplify right side
    667,774.89x = 347,636,560,874.21
  5. Step 5: Solve for x
    x = 347,636,560,874.21/667,774.89
  6. Step 6: Final answer
    x = 520,589.45

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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.