Home / 991,374.07-1,487,139.90-422,760.03

Finding the Fourth Proportional to 991,374.07, 1,487,139.90 and 422,760.03

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Solution

The fourth proportional to 991,374.07, 1,487,139.90 and 422,760.03 is: 634,173.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,374.07 : 1,487,139.90 = 422,760.03 : x
  2. Step 2: Convert to fraction form
    991,374.07/1,487,139.90 = 422,760.03/x
  3. Step 3: Cross multiply
    991,374.07x = 1,487,139.90 × 422,760.03
  4. Step 4: Simplify right side
    991,374.07x = 628,703,308,738.20
  5. Step 5: Solve for x
    x = 628,703,308,738.20/991,374.07
  6. Step 6: Final answer
    x = 634,173.65

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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.