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Finding the Fourth Proportional to 821,663.60, 1,232,495.40 and 289,180.40

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Solution

The fourth proportional to 821,663.60, 1,232,495.40 and 289,180.40 is: 433,770.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,663.60 : 1,232,495.40 = 289,180.40 : x
  2. Step 2: Convert to fraction form
    821,663.60/1,232,495.40 = 289,180.40/x
  3. Step 3: Cross multiply
    821,663.60x = 1,232,495.40 × 289,180.40
  4. Step 4: Simplify right side
    821,663.60x = 356,413,512,770.16
  5. Step 5: Solve for x
    x = 356,413,512,770.16/821,663.60
  6. Step 6: Final answer
    x = 433,770.60

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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.