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Finding the Fourth Proportional to 666,109.50, 919,175.55 and 375,705.06

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Solution

The fourth proportional to 666,109.50, 919,175.55 and 375,705.06 is: 518,441.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,109.50 : 919,175.55 = 375,705.06 : x
  2. Step 2: Convert to fraction form
    666,109.50/919,175.55 = 375,705.06/x
  3. Step 3: Cross multiply
    666,109.50x = 919,175.55 × 375,705.06
  4. Step 4: Simplify right side
    666,109.50x = 345,338,905,163.28
  5. Step 5: Solve for x
    x = 345,338,905,163.28/666,109.50
  6. Step 6: Final answer
    x = 518,441.65

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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.