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Finding the Fourth Proportional to 268,868.40, 403,302.60 and 257,350.20

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Solution

The fourth proportional to 268,868.40, 403,302.60 and 257,350.20 is: 386,025.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,868.40 : 403,302.60 = 257,350.20 : x
  2. Step 2: Convert to fraction form
    268,868.40/403,302.60 = 257,350.20/x
  3. Step 3: Cross multiply
    268,868.40x = 403,302.60 × 257,350.20
  4. Step 4: Simplify right side
    268,868.40x = 103,790,004,770.52
  5. Step 5: Solve for x
    x = 103,790,004,770.52/268,868.40
  6. Step 6: Final answer
    x = 386,025.30

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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.