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Finding the Fourth Proportional to 259,510.40, 389,265.60 and 257,052.80

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Solution

The fourth proportional to 259,510.40, 389,265.60 and 257,052.80 is: 385,579.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,510.40 : 389,265.60 = 257,052.80 : x
  2. Step 2: Convert to fraction form
    259,510.40/389,265.60 = 257,052.80/x
  3. Step 3: Cross multiply
    259,510.40x = 389,265.60 × 257,052.80
  4. Step 4: Simplify right side
    259,510.40x = 100,061,812,423.68
  5. Step 5: Solve for x
    x = 100,061,812,423.68/259,510.40
  6. Step 6: Final answer
    x = 385,579.20

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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.