Home / 718,971.07-991,845.70-428,419.59

Finding the Fourth Proportional to 718,971.07, 991,845.70 and 428,419.59

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Solution

The fourth proportional to 718,971.07, 991,845.70 and 428,419.59 is: 591,019.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,971.07 : 991,845.70 = 428,419.59 : x
  2. Step 2: Convert to fraction form
    718,971.07/991,845.70 = 428,419.59/x
  3. Step 3: Cross multiply
    718,971.07x = 991,845.70 × 428,419.59
  4. Step 4: Simplify right side
    718,971.07x = 424,926,128,137.26
  5. Step 5: Solve for x
    x = 424,926,128,137.26/718,971.07
  6. Step 6: Final answer
    x = 591,019.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.