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Finding the Fourth Proportional to 478,415.20, 717,622.80 and 455,087.20

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Solution

The fourth proportional to 478,415.20, 717,622.80 and 455,087.20 is: 682,630.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,415.20 : 717,622.80 = 455,087.20 : x
  2. Step 2: Convert to fraction form
    478,415.20/717,622.80 = 455,087.20/x
  3. Step 3: Cross multiply
    478,415.20x = 717,622.80 × 455,087.20
  4. Step 4: Simplify right side
    478,415.20x = 326,580,950,708.16
  5. Step 5: Solve for x
    x = 326,580,950,708.16/478,415.20
  6. Step 6: Final answer
    x = 682,630.80

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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.