Home / 643,611.20-965,416.80-602,139.20

Finding the Fourth Proportional to 643,611.20, 965,416.80 and 602,139.20

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Solution

The fourth proportional to 643,611.20, 965,416.80 and 602,139.20 is: 903,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,611.20 : 965,416.80 = 602,139.20 : x
  2. Step 2: Convert to fraction form
    643,611.20/965,416.80 = 602,139.20/x
  3. Step 3: Cross multiply
    643,611.20x = 965,416.80 × 602,139.20
  4. Step 4: Simplify right side
    643,611.20x = 581,315,299,618.56
  5. Step 5: Solve for x
    x = 581,315,299,618.56/643,611.20
  6. Step 6: Final answer
    x = 903,208.80

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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.