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Finding the Fourth Proportional to 485,593.87, 670,168.53 and 281,707.15

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Solution

The fourth proportional to 485,593.87, 670,168.53 and 281,707.15 is: 388,784.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,593.87 : 670,168.53 = 281,707.15 : x
  2. Step 2: Convert to fraction form
    485,593.87/670,168.53 = 281,707.15/x
  3. Step 3: Cross multiply
    485,593.87x = 670,168.53 × 281,707.15
  4. Step 4: Simplify right side
    485,593.87x = 188,791,261,846.61
  5. Step 5: Solve for x
    x = 188,791,261,846.61/485,593.87
  6. Step 6: Final answer
    x = 388,784.28

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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.