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Finding the Fourth Proportional to 620,200.80, 930,560.40 and 199,605.60

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Solution

The fourth proportional to 620,200.80, 930,560.40 and 199,605.60 is: 299,491.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,200.80 : 930,560.40 = 199,605.60 : x
  2. Step 2: Convert to fraction form
    620,200.80/930,560.40 = 199,605.60/x
  3. Step 3: Cross multiply
    620,200.80x = 930,560.40 × 199,605.60
  4. Step 4: Simplify right side
    620,200.80x = 185,745,066,978.24
  5. Step 5: Solve for x
    x = 185,745,066,978.24/620,200.80
  6. Step 6: Final answer
    x = 299,491.82

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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.