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Finding the Fourth Proportional to 667,602.24, 921,376.80 and 381,056.64

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Solution

The fourth proportional to 667,602.24, 921,376.80 and 381,056.64 is: 525,907.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,602.24 : 921,376.80 = 381,056.64 : x
  2. Step 2: Convert to fraction form
    667,602.24/921,376.80 = 381,056.64/x
  3. Step 3: Cross multiply
    667,602.24x = 921,376.80 × 381,056.64
  4. Step 4: Simplify right side
    667,602.24x = 351,096,747,581.95
  5. Step 5: Solve for x
    x = 351,096,747,581.95/667,602.24
  6. Step 6: Final answer
    x = 525,907.08

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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.