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Finding the Fourth Proportional to 522,085.70, 783,128.55 and 515,087.30

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Solution

The fourth proportional to 522,085.70, 783,128.55 and 515,087.30 is: 772,630.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,085.70 : 783,128.55 = 515,087.30 : x
  2. Step 2: Convert to fraction form
    522,085.70/783,128.55 = 515,087.30/x
  3. Step 3: Cross multiply
    522,085.70x = 783,128.55 × 515,087.30
  4. Step 4: Simplify right side
    522,085.70x = 403,379,570,372.42
  5. Step 5: Solve for x
    x = 403,379,570,372.42/522,085.70
  6. Step 6: Final answer
    x = 772,630.95

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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.