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Finding the Fourth Proportional to 666,384.18, 918,653.62 and 475,065.42

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Solution

The fourth proportional to 666,384.18, 918,653.62 and 475,065.42 is: 654,908.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,384.18 : 918,653.62 = 475,065.42 : x
  2. Step 2: Convert to fraction form
    666,384.18/918,653.62 = 475,065.42/x
  3. Step 3: Cross multiply
    666,384.18x = 918,653.62 × 475,065.42
  4. Step 4: Simplify right side
    666,384.18x = 436,420,567,819.82
  5. Step 5: Solve for x
    x = 436,420,567,819.82/666,384.18
  6. Step 6: Final answer
    x = 654,908.36

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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.