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Finding the Fourth Proportional to 666,908.46, 920,247.89 and 380,411.46

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Solution

The fourth proportional to 666,908.46, 920,247.89 and 380,411.46 is: 524,918.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,908.46 : 920,247.89 = 380,411.46 : x
  2. Step 2: Convert to fraction form
    666,908.46/920,247.89 = 380,411.46/x
  3. Step 3: Cross multiply
    666,908.46x = 920,247.89 × 380,411.46
  4. Step 4: Simplify right side
    666,908.46x = 350,072,841,494.76
  5. Step 5: Solve for x
    x = 350,072,841,494.76/666,908.46
  6. Step 6: Final answer
    x = 524,918.88

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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.