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Finding the Fourth Proportional to 655,600.20, 983,400.30 and 478,453.20

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Solution

The fourth proportional to 655,600.20, 983,400.30 and 478,453.20 is: 717,679.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,600.20 : 983,400.30 = 478,453.20 : x
  2. Step 2: Convert to fraction form
    655,600.20/983,400.30 = 478,453.20/x
  3. Step 3: Cross multiply
    655,600.20x = 983,400.30 × 478,453.20
  4. Step 4: Simplify right side
    655,600.20x = 470,511,020,415.96
  5. Step 5: Solve for x
    x = 470,511,020,415.96/655,600.20
  6. Step 6: Final answer
    x = 717,679.80

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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.