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Finding the Fourth Proportional to 522,028.40, 783,042.60 and 321,699.20

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Solution

The fourth proportional to 522,028.40, 783,042.60 and 321,699.20 is: 482,548.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,028.40 : 783,042.60 = 321,699.20 : x
  2. Step 2: Convert to fraction form
    522,028.40/783,042.60 = 321,699.20/x
  3. Step 3: Cross multiply
    522,028.40x = 783,042.60 × 321,699.20
  4. Step 4: Simplify right side
    522,028.40x = 251,904,177,985.92
  5. Step 5: Solve for x
    x = 251,904,177,985.92/522,028.40
  6. Step 6: Final answer
    x = 482,548.80

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Double scale
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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.