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Finding the Fourth Proportional to 510,133.60, 765,200.40 and 485,639.20

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Solution

The fourth proportional to 510,133.60, 765,200.40 and 485,639.20 is: 728,458.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    510,133.60 : 765,200.40 = 485,639.20 : x
  2. Step 2: Convert to fraction form
    510,133.60/765,200.40 = 485,639.20/x
  3. Step 3: Cross multiply
    510,133.60x = 765,200.40 × 485,639.20
  4. Step 4: Simplify right side
    510,133.60x = 371,611,310,095.68
  5. Step 5: Solve for x
    x = 371,611,310,095.68/510,133.60
  6. Step 6: Final answer
    x = 728,458.80

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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.