Home / 628,327.20-940,417.20-487,322.40

Finding the Fourth Proportional to 628,327.20, 940,417.20 and 487,322.40

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Solution

The fourth proportional to 628,327.20, 940,417.20 and 487,322.40 is: 729,375.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,327.20 : 940,417.20 = 487,322.40 : x
  2. Step 2: Convert to fraction form
    628,327.20/940,417.20 = 487,322.40/x
  3. Step 3: Cross multiply
    628,327.20x = 940,417.20 × 487,322.40
  4. Step 4: Simplify right side
    628,327.20x = 458,286,366,905.28
  5. Step 5: Solve for x
    x = 458,286,366,905.28/628,327.20
  6. Step 6: Final answer
    x = 729,375.34

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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.