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Finding the Fourth Proportional to 665,617.14, 918,449.01 and 379,100.70

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Solution

The fourth proportional to 665,617.14, 918,449.01 and 379,100.70 is: 523,100.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,617.14 : 918,449.01 = 379,100.70 : x
  2. Step 2: Convert to fraction form
    665,617.14/918,449.01 = 379,100.70/x
  3. Step 3: Cross multiply
    665,617.14x = 918,449.01 × 379,100.70
  4. Step 4: Simplify right side
    665,617.14x = 348,184,662,605.31
  5. Step 5: Solve for x
    x = 348,184,662,605.31/665,617.14
  6. Step 6: Final answer
    x = 523,100.51

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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.