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Finding the Fourth Proportional to 485,601.80, 670,117.38 and 281,639.84

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Solution

The fourth proportional to 485,601.80, 670,117.38 and 281,639.84 is: 388,655.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,601.80 : 670,117.38 = 281,639.84 : x
  2. Step 2: Convert to fraction form
    485,601.80/670,117.38 = 281,639.84/x
  3. Step 3: Cross multiply
    485,601.80x = 670,117.38 × 281,639.84
  4. Step 4: Simplify right side
    485,601.80x = 188,731,751,684.42
  5. Step 5: Solve for x
    x = 188,731,751,684.42/485,601.80
  6. Step 6: Final answer
    x = 388,655.38

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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.