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Finding the Fourth Proportional to 666,694.51, 920,054.17 and 380,208.44

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Solution

The fourth proportional to 666,694.51, 920,054.17 and 380,208.44 is: 524,696.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,694.51 : 920,054.17 = 380,208.44 : x
  2. Step 2: Convert to fraction form
    666,694.51/920,054.17 = 380,208.44/x
  3. Step 3: Cross multiply
    666,694.51x = 920,054.17 × 380,208.44
  4. Step 4: Simplify right side
    666,694.51x = 349,812,360,691.20
  5. Step 5: Solve for x
    x = 349,812,360,691.20/666,694.51
  6. Step 6: Final answer
    x = 524,696.63

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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.