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Finding the Fourth Proportional to 519,114.30, 778,671.45 and 485,653.20

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Solution

The fourth proportional to 519,114.30, 778,671.45 and 485,653.20 is: 728,479.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,114.30 : 778,671.45 = 485,653.20 : x
  2. Step 2: Convert to fraction form
    519,114.30/778,671.45 = 485,653.20/x
  3. Step 3: Cross multiply
    519,114.30x = 778,671.45 × 485,653.20
  4. Step 4: Simplify right side
    519,114.30x = 378,164,281,441.14
  5. Step 5: Solve for x
    x = 378,164,281,441.14/519,114.30
  6. Step 6: Final answer
    x = 728,479.80

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Similar ratio
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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.