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Finding the Fourth Proportional to 303,635.40, 455,744.70 and 259,312.20

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Solution

The fourth proportional to 303,635.40, 455,744.70 and 259,312.20 is: 389,217.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,635.40 : 455,744.70 = 259,312.20 : x
  2. Step 2: Convert to fraction form
    303,635.40/455,744.70 = 259,312.20/x
  3. Step 3: Cross multiply
    303,635.40x = 455,744.70 × 259,312.20
  4. Step 4: Simplify right side
    303,635.40x = 118,180,160,795.34
  5. Step 5: Solve for x
    x = 118,180,160,795.34/303,635.40
  6. Step 6: Final answer
    x = 389,217.33

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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.