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Finding the Fourth Proportional to 285,059.20, 428,510.40 and 262,940.80

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Solution

The fourth proportional to 285,059.20, 428,510.40 and 262,940.80 is: 395,261.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,059.20 : 428,510.40 = 262,940.80 : x
  2. Step 2: Convert to fraction form
    285,059.20/428,510.40 = 262,940.80/x
  3. Step 3: Cross multiply
    285,059.20x = 428,510.40 × 262,940.80
  4. Step 4: Simplify right side
    285,059.20x = 112,672,867,384.32
  5. Step 5: Solve for x
    x = 112,672,867,384.32/285,059.20
  6. Step 6: Final answer
    x = 395,261.29

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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.