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Finding the Fourth Proportional to 478,823.20, 718,234.80 and 401,840.80

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Solution

The fourth proportional to 478,823.20, 718,234.80 and 401,840.80 is: 602,761.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,823.20 : 718,234.80 = 401,840.80 : x
  2. Step 2: Convert to fraction form
    478,823.20/718,234.80 = 401,840.80/x
  3. Step 3: Cross multiply
    478,823.20x = 718,234.80 × 401,840.80
  4. Step 4: Simplify right side
    478,823.20x = 288,616,046,619.84
  5. Step 5: Solve for x
    x = 288,616,046,619.84/478,823.20
  6. Step 6: Final answer
    x = 602,761.20

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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.