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Finding the Fourth Proportional to 817,602.80, 1,226,404.20 and 256,636.40

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Solution

The fourth proportional to 817,602.80, 1,226,404.20 and 256,636.40 is: 384,954.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,602.80 : 1,226,404.20 = 256,636.40 : x
  2. Step 2: Convert to fraction form
    817,602.80/1,226,404.20 = 256,636.40/x
  3. Step 3: Cross multiply
    817,602.80x = 1,226,404.20 × 256,636.40
  4. Step 4: Simplify right side
    817,602.80x = 314,739,958,832.88
  5. Step 5: Solve for x
    x = 314,739,958,832.88/817,602.80
  6. Step 6: Final answer
    x = 384,954.60

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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.