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Finding the Fourth Proportional to 519,663.60, 779,495.40 and 490,633.20

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Solution

The fourth proportional to 519,663.60, 779,495.40 and 490,633.20 is: 735,949.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,663.60 : 779,495.40 = 490,633.20 : x
  2. Step 2: Convert to fraction form
    519,663.60/779,495.40 = 490,633.20/x
  3. Step 3: Cross multiply
    519,663.60x = 779,495.40 × 490,633.20
  4. Step 4: Simplify right side
    519,663.60x = 382,446,322,487.28
  5. Step 5: Solve for x
    x = 382,446,322,487.28/519,663.60
  6. Step 6: Final answer
    x = 735,949.80

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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.