Home / 426,386.40-639,579.60-268,922.40

Finding the Fourth Proportional to 426,386.40, 639,579.60 and 268,922.40

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Solution

The fourth proportional to 426,386.40, 639,579.60 and 268,922.40 is: 403,383.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,386.40 : 639,579.60 = 268,922.40 : x
  2. Step 2: Convert to fraction form
    426,386.40/639,579.60 = 268,922.40/x
  3. Step 3: Cross multiply
    426,386.40x = 639,579.60 × 268,922.40
  4. Step 4: Simplify right side
    426,386.40x = 171,997,281,023.04
  5. Step 5: Solve for x
    x = 171,997,281,023.04/426,386.40
  6. Step 6: Final answer
    x = 403,383.60

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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.