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Finding the Fourth Proportional to 522,081.20, 783,121.80 and 459,873.20

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Solution

The fourth proportional to 522,081.20, 783,121.80 and 459,873.20 is: 689,809.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,081.20 : 783,121.80 = 459,873.20 : x
  2. Step 2: Convert to fraction form
    522,081.20/783,121.80 = 459,873.20/x
  3. Step 3: Cross multiply
    522,081.20x = 783,121.80 × 459,873.20
  4. Step 4: Simplify right side
    522,081.20x = 360,136,728,155.76
  5. Step 5: Solve for x
    x = 360,136,728,155.76/522,081.20
  6. Step 6: Final answer
    x = 689,809.80

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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.