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Finding the Fourth Proportional to 485,048.74, 669,366.86 and 281,218

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Solution

The fourth proportional to 485,048.74, 669,366.86 and 281,218 is: 388,080.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,048.74 : 669,366.86 = 281,218 : x
  2. Step 2: Convert to fraction form
    485,048.74/669,366.86 = 281,218/x
  3. Step 3: Cross multiply
    485,048.74x = 669,366.86 × 281,218
  4. Step 4: Simplify right side
    485,048.74x = 188,238,009,635.48
  5. Step 5: Solve for x
    x = 188,238,009,635.48/485,048.74
  6. Step 6: Final answer
    x = 388,080.61

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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.