Home / 628,330.20-940,421.70-487,325.40

Finding the Fourth Proportional to 628,330.20, 940,421.70 and 487,325.40

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Solution

The fourth proportional to 628,330.20, 940,421.70 and 487,325.40 is: 729,379.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,330.20 : 940,421.70 = 487,325.40 : x
  2. Step 2: Convert to fraction form
    628,330.20/940,421.70 = 487,325.40/x
  3. Step 3: Cross multiply
    628,330.20x = 940,421.70 × 487,325.40
  4. Step 4: Simplify right side
    628,330.20x = 458,291,381,121.18
  5. Step 5: Solve for x
    x = 458,291,381,121.18/628,330.20
  6. Step 6: Final answer
    x = 729,379.84

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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.