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Finding the Fourth Proportional to 719,612.14, 993,080.25 and 397,342.66

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Solution

The fourth proportional to 719,612.14, 993,080.25 and 397,342.66 is: 548,341.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,612.14 : 993,080.25 = 397,342.66 : x
  2. Step 2: Convert to fraction form
    719,612.14/993,080.25 = 397,342.66/x
  3. Step 3: Cross multiply
    719,612.14x = 993,080.25 × 397,342.66
  4. Step 4: Simplify right side
    719,612.14x = 394,593,148,128.47
  5. Step 5: Solve for x
    x = 394,593,148,128.47/719,612.14
  6. Step 6: Final answer
    x = 548,341.43

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Double scale
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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.