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Finding the Fourth Proportional to 478,821.70, 718,232.55 and 401,839.30

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Solution

The fourth proportional to 478,821.70, 718,232.55 and 401,839.30 is: 602,758.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,821.70 : 718,232.55 = 401,839.30 : x
  2. Step 2: Convert to fraction form
    478,821.70/718,232.55 = 401,839.30/x
  3. Step 3: Cross multiply
    478,821.70x = 718,232.55 × 401,839.30
  4. Step 4: Simplify right side
    478,821.70x = 288,614,065,129.22
  5. Step 5: Solve for x
    x = 288,614,065,129.22/478,821.70
  6. Step 6: Final answer
    x = 602,758.95

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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.