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Finding the Fourth Proportional to 280,479.74, 389,674.96 and 277,116.70

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Solution

The fourth proportional to 280,479.74, 389,674.96 and 277,116.70 is: 385,002.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,479.74 : 389,674.96 = 277,116.70 : x
  2. Step 2: Convert to fraction form
    280,479.74/389,674.96 = 277,116.70/x
  3. Step 3: Cross multiply
    280,479.74x = 389,674.96 × 277,116.70
  4. Step 4: Simplify right side
    280,479.74x = 107,985,438,987.83
  5. Step 5: Solve for x
    x = 107,985,438,987.83/280,479.74
  6. Step 6: Final answer
    x = 385,002.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.