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Finding the Fourth Proportional to 522,071.80, 783,107.70 and 321,742.60

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Solution

The fourth proportional to 522,071.80, 783,107.70 and 321,742.60 is: 482,613.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,071.80 : 783,107.70 = 321,742.60 : x
  2. Step 2: Convert to fraction form
    522,071.80/783,107.70 = 321,742.60/x
  3. Step 3: Cross multiply
    522,071.80x = 783,107.70 × 321,742.60
  4. Step 4: Simplify right side
    522,071.80x = 251,959,107,478.02
  5. Step 5: Solve for x
    x = 251,959,107,478.02/522,071.80
  6. Step 6: Final answer
    x = 482,613.90

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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.