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Finding the Fourth Proportional to 280,395.70, 386,990.48 and 178,314.74

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Solution

The fourth proportional to 280,395.70, 386,990.48 and 178,314.74 is: 246,102.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,395.70 : 386,990.48 = 178,314.74 : x
  2. Step 2: Convert to fraction form
    280,395.70/386,990.48 = 178,314.74/x
  3. Step 3: Cross multiply
    280,395.70x = 386,990.48 × 178,314.74
  4. Step 4: Simplify right side
    280,395.70x = 69,006,106,785.72
  5. Step 5: Solve for x
    x = 69,006,106,785.72/280,395.70
  6. Step 6: Final answer
    x = 246,102.59

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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.