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Finding the Fourth Proportional to 302,938.20, 455,391.45 and 259,635.60

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Solution

The fourth proportional to 302,938.20, 455,391.45 and 259,635.60 is: 390,296.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    302,938.20 : 455,391.45 = 259,635.60 : x
  2. Step 2: Convert to fraction form
    302,938.20/455,391.45 = 259,635.60/x
  3. Step 3: Cross multiply
    302,938.20x = 455,391.45 × 259,635.60
  4. Step 4: Simplify right side
    302,938.20x = 118,235,832,355.62
  5. Step 5: Solve for x
    x = 118,235,832,355.62/302,938.20
  6. Step 6: Final answer
    x = 390,296.87

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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.