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Finding the Fourth Proportional to 985,672.40, 1,478,508.60 and 354,606.80

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Solution

The fourth proportional to 985,672.40, 1,478,508.60 and 354,606.80 is: 531,910.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,672.40 : 1,478,508.60 = 354,606.80 : x
  2. Step 2: Convert to fraction form
    985,672.40/1,478,508.60 = 354,606.80/x
  3. Step 3: Cross multiply
    985,672.40x = 1,478,508.60 × 354,606.80
  4. Step 4: Simplify right side
    985,672.40x = 524,289,203,418.48
  5. Step 5: Solve for x
    x = 524,289,203,418.48/985,672.40
  6. Step 6: Final answer
    x = 531,910.20

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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.