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Finding the Fourth Proportional to 478,961.25, 718,441.88 and 194,806.40

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Solution

The fourth proportional to 478,961.25, 718,441.88 and 194,806.40 is: 292,209.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,961.25 : 718,441.88 = 194,806.40 : x
  2. Step 2: Convert to fraction form
    478,961.25/718,441.88 = 194,806.40/x
  3. Step 3: Cross multiply
    478,961.25x = 718,441.88 × 194,806.40
  4. Step 4: Simplify right side
    478,961.25x = 139,957,075,278
  5. Step 5: Solve for x
    x = 139,957,075,278/478,961.25
  6. Step 6: Final answer
    x = 292,209.60

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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.