Home / 991,374.20-1,487,140.09-422,760.15

Finding the Fourth Proportional to 991,374.20, 1,487,140.09 and 422,760.15

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Solution

The fourth proportional to 991,374.20, 1,487,140.09 and 422,760.15 is: 634,173.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,374.20 : 1,487,140.09 = 422,760.15 : x
  2. Step 2: Convert to fraction form
    991,374.20/1,487,140.09 = 422,760.15/x
  3. Step 3: Cross multiply
    991,374.20x = 1,487,140.09 × 422,760.15
  4. Step 4: Simplify right side
    991,374.20x = 628,703,566,462.51
  5. Step 5: Solve for x
    x = 628,703,566,462.51/991,374.20
  6. Step 6: Final answer
    x = 634,173.82

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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.