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Finding the Fourth Proportional to 817,228.80, 1,225,843.20 and 256,262.40

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Solution

The fourth proportional to 817,228.80, 1,225,843.20 and 256,262.40 is: 384,393.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,228.80 : 1,225,843.20 = 256,262.40 : x
  2. Step 2: Convert to fraction form
    817,228.80/1,225,843.20 = 256,262.40/x
  3. Step 3: Cross multiply
    817,228.80x = 1,225,843.20 × 256,262.40
  4. Step 4: Simplify right side
    817,228.80x = 314,137,520,455.68
  5. Step 5: Solve for x
    x = 314,137,520,455.68/817,228.80
  6. Step 6: Final answer
    x = 384,393.60

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Similar ratio
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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.