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Finding the Fourth Proportional to 666,467.13, 919,701.75 and 380,079.39

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Solution

The fourth proportional to 666,467.13, 919,701.75 and 380,079.39 is: 524,496.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,467.13 : 919,701.75 = 380,079.39 : x
  2. Step 2: Convert to fraction form
    666,467.13/919,701.75 = 380,079.39/x
  3. Step 3: Cross multiply
    666,467.13x = 919,701.75 × 380,079.39
  4. Step 4: Simplify right side
    666,467.13x = 349,559,680,121.93
  5. Step 5: Solve for x
    x = 349,559,680,121.93/666,467.13
  6. Step 6: Final answer
    x = 524,496.50

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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.