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Finding the Fourth Proportional to 666,405.38, 918,682.88 and 475,086.62

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Solution

The fourth proportional to 666,405.38, 918,682.88 and 475,086.62 is: 654,937.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,405.38 : 918,682.88 = 475,086.62 : x
  2. Step 2: Convert to fraction form
    666,405.38/918,682.88 = 475,086.62/x
  3. Step 3: Cross multiply
    666,405.38x = 918,682.88 × 475,086.62
  4. Step 4: Simplify right side
    666,405.38x = 436,453,937,342.22
  5. Step 5: Solve for x
    x = 436,453,937,342.22/666,405.38
  6. Step 6: Final answer
    x = 654,937.60

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1.5x scale

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.