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Finding the Fourth Proportional to 272,287.60, 408,431.40 and 260,040.40

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Solution

The fourth proportional to 272,287.60, 408,431.40 and 260,040.40 is: 390,060.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,287.60 : 408,431.40 = 260,040.40 : x
  2. Step 2: Convert to fraction form
    272,287.60/408,431.40 = 260,040.40/x
  3. Step 3: Cross multiply
    272,287.60x = 408,431.40 × 260,040.40
  4. Step 4: Simplify right side
    272,287.60x = 106,208,664,628.56
  5. Step 5: Solve for x
    x = 106,208,664,628.56/272,287.60
  6. Step 6: Final answer
    x = 390,060.60

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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.