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Finding the Fourth Proportional to 623,810.28, 860,838.76 and 351,874.20

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Solution

The fourth proportional to 623,810.28, 860,838.76 and 351,874.20 is: 485,575.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,810.28 : 860,838.76 = 351,874.20 : x
  2. Step 2: Convert to fraction form
    623,810.28/860,838.76 = 351,874.20/x
  3. Step 3: Cross multiply
    623,810.28x = 860,838.76 × 351,874.20
  4. Step 4: Simplify right side
    623,810.28x = 302,906,950,003.99
  5. Step 5: Solve for x
    x = 302,906,950,003.99/623,810.28
  6. Step 6: Final answer
    x = 485,575.44

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.