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Finding the Fourth Proportional to 666,787.14, 920,215.08 and 380,314.44

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Solution

The fourth proportional to 666,787.14, 920,215.08 and 380,314.44 is: 524,861.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,787.14 : 920,215.08 = 380,314.44 : x
  2. Step 2: Convert to fraction form
    666,787.14/920,215.08 = 380,314.44/x
  3. Step 3: Cross multiply
    666,787.14x = 920,215.08 × 380,314.44
  4. Step 4: Simplify right side
    666,787.14x = 349,971,082,829.76
  5. Step 5: Solve for x
    x = 349,971,082,829.76/666,787.14
  6. Step 6: Final answer
    x = 524,861.78

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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.