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Finding the Fourth Proportional to 485,494.38, 670,018.73 and 281,543.53

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Solution

The fourth proportional to 485,494.38, 670,018.73 and 281,543.53 is: 388,551.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,494.38 : 670,018.73 = 281,543.53 : x
  2. Step 2: Convert to fraction form
    485,494.38/670,018.73 = 281,543.53/x
  3. Step 3: Cross multiply
    485,494.38x = 670,018.73 × 281,543.53
  4. Step 4: Simplify right side
    485,494.38x = 188,639,438,410.32
  5. Step 5: Solve for x
    x = 188,639,438,410.32/485,494.38
  6. Step 6: Final answer
    x = 388,551.23

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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.