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Finding the Fourth Proportional to 666,118.46, 919,220.72 and 379,730.82

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Solution

The fourth proportional to 666,118.46, 919,220.72 and 379,730.82 is: 524,015.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,118.46 : 919,220.72 = 379,730.82 : x
  2. Step 2: Convert to fraction form
    666,118.46/919,220.72 = 379,730.82/x
  3. Step 3: Cross multiply
    666,118.46x = 919,220.72 × 379,730.82
  4. Step 4: Simplify right side
    666,118.46x = 349,056,437,766.59
  5. Step 5: Solve for x
    x = 349,056,437,766.59/666,118.46
  6. Step 6: Final answer
    x = 524,015.56

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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.