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Finding the Fourth Proportional to 991,301.10, 1,367,978.67 and 538,588.86

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Solution

The fourth proportional to 991,301.10, 1,367,978.67 and 538,588.86 is: 743,243.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,301.10 : 1,367,978.67 = 538,588.86 : x
  2. Step 2: Convert to fraction form
    991,301.10/1,367,978.67 = 538,588.86/x
  3. Step 3: Cross multiply
    991,301.10x = 1,367,978.67 × 538,588.86
  4. Step 4: Simplify right side
    991,301.10x = 736,778,072,379.62
  5. Step 5: Solve for x
    x = 736,778,072,379.62/991,301.10
  6. Step 6: Final answer
    x = 743,243.47

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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.