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Finding the Fourth Proportional to 403,770.80, 604,975.80 and 319,206.80

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Solution

The fourth proportional to 403,770.80, 604,975.80 and 319,206.80 is: 478,272.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,770.80 : 604,975.80 = 319,206.80 : x
  2. Step 2: Convert to fraction form
    403,770.80/604,975.80 = 319,206.80/x
  3. Step 3: Cross multiply
    403,770.80x = 604,975.80 × 319,206.80
  4. Step 4: Simplify right side
    403,770.80x = 193,112,389,195.44
  5. Step 5: Solve for x
    x = 193,112,389,195.44/403,770.80
  6. Step 6: Final answer
    x = 478,272.30

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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.