Home / 643,622.40-965,433.60-288,259.20

Finding the Fourth Proportional to 643,622.40, 965,433.60 and 288,259.20

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Solution

The fourth proportional to 643,622.40, 965,433.60 and 288,259.20 is: 432,388.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,622.40 : 965,433.60 = 288,259.20 : x
  2. Step 2: Convert to fraction form
    643,622.40/965,433.60 = 288,259.20/x
  3. Step 3: Cross multiply
    643,622.40x = 965,433.60 × 288,259.20
  4. Step 4: Simplify right side
    643,622.40x = 278,295,117,189.12
  5. Step 5: Solve for x
    x = 278,295,117,189.12/643,622.40
  6. Step 6: Final answer
    x = 432,388.80

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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.