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Finding the Fourth Proportional to 911,863.20, 1,367,794.80 and 280,970.40

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Solution

The fourth proportional to 911,863.20, 1,367,794.80 and 280,970.40 is: 421,455.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,863.20 : 1,367,794.80 = 280,970.40 : x
  2. Step 2: Convert to fraction form
    911,863.20/1,367,794.80 = 280,970.40/x
  3. Step 3: Cross multiply
    911,863.20x = 1,367,794.80 × 280,970.40
  4. Step 4: Simplify right side
    911,863.20x = 384,309,852,073.92
  5. Step 5: Solve for x
    x = 384,309,852,073.92/911,863.20
  6. Step 6: Final answer
    x = 421,455.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.