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Finding the Fourth Proportional to 666,068.50, 919,172.54 and 360,142.70

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Solution

The fourth proportional to 666,068.50, 919,172.54 and 360,142.70 is: 496,995.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,068.50 : 919,172.54 = 360,142.70 : x
  2. Step 2: Convert to fraction form
    666,068.50/919,172.54 = 360,142.70/x
  3. Step 3: Cross multiply
    666,068.50x = 919,172.54 × 360,142.70
  4. Step 4: Simplify right side
    666,068.50x = 331,033,280,321.46
  5. Step 5: Solve for x
    x = 331,033,280,321.46/666,068.50
  6. Step 6: Final answer
    x = 496,995.85

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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.