Home / 426,103.20-639,154.80-268,509.60

Finding the Fourth Proportional to 426,103.20, 639,154.80 and 268,509.60

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Solution

The fourth proportional to 426,103.20, 639,154.80 and 268,509.60 is: 402,764.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,103.20 : 639,154.80 = 268,509.60 : x
  2. Step 2: Convert to fraction form
    426,103.20/639,154.80 = 268,509.60/x
  3. Step 3: Cross multiply
    426,103.20x = 639,154.80 × 268,509.60
  4. Step 4: Simplify right side
    426,103.20x = 171,619,199,686.08
  5. Step 5: Solve for x
    x = 171,619,199,686.08/426,103.20
  6. Step 6: Final answer
    x = 402,764.40

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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.