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Finding the Fourth Proportional to 666,434.40, 919,703.88 and 379,951.44

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Solution

The fourth proportional to 666,434.40, 919,703.88 and 379,951.44 is: 524,346.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,434.40 : 919,703.88 = 379,951.44 : x
  2. Step 2: Convert to fraction form
    666,434.40/919,703.88 = 379,951.44/x
  3. Step 3: Cross multiply
    666,434.40x = 919,703.88 × 379,951.44
  4. Step 4: Simplify right side
    666,434.40x = 349,442,813,579.59
  5. Step 5: Solve for x
    x = 349,442,813,579.59/666,434.40
  6. Step 6: Final answer
    x = 524,346.90

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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.