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Finding the Fourth Proportional to 478,813.80, 718,220.70 and 419,716.20

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Solution

The fourth proportional to 478,813.80, 718,220.70 and 419,716.20 is: 629,574.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,813.80 : 718,220.70 = 419,716.20 : x
  2. Step 2: Convert to fraction form
    478,813.80/718,220.70 = 419,716.20/x
  3. Step 3: Cross multiply
    478,813.80x = 718,220.70 × 419,716.20
  4. Step 4: Simplify right side
    478,813.80x = 301,448,862,965.34
  5. Step 5: Solve for x
    x = 301,448,862,965.34/478,813.80
  6. Step 6: Final answer
    x = 629,574.30

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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.