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Finding the Fourth Proportional to 666,443.06, 918,734.73 and 475,124.30

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Solution

The fourth proportional to 666,443.06, 918,734.73 and 475,124.30 is: 654,989.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,443.06 : 918,734.73 = 475,124.30 : x
  2. Step 2: Convert to fraction form
    666,443.06/918,734.73 = 475,124.30/x
  3. Step 3: Cross multiply
    666,443.06x = 918,734.73 × 475,124.30
  4. Step 4: Simplify right side
    666,443.06x = 436,513,195,476.94
  5. Step 5: Solve for x
    x = 436,513,195,476.94/666,443.06
  6. Step 6: Final answer
    x = 654,989.48

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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.