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Finding the Fourth Proportional to 666,117.65, 919,186.89 and 375,713.21

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Solution

The fourth proportional to 666,117.65, 919,186.89 and 375,713.21 is: 518,452.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,117.65 : 919,186.89 = 375,713.21 : x
  2. Step 2: Convert to fraction form
    666,117.65/919,186.89 = 375,713.21/x
  3. Step 3: Cross multiply
    666,117.65x = 919,186.89 × 375,713.21
  4. Step 4: Simplify right side
    666,117.65x = 345,350,657,031.82
  5. Step 5: Solve for x
    x = 345,350,657,031.82/666,117.65
  6. Step 6: Final answer
    x = 518,452.94

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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.