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Finding the Fourth Proportional to 662,128.67, 993,187.74 and 438,489.83

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Solution

The fourth proportional to 662,128.67, 993,187.74 and 438,489.83 is: 657,731.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,128.67 : 993,187.74 = 438,489.83 : x
  2. Step 2: Convert to fraction form
    662,128.67/993,187.74 = 438,489.83/x
  3. Step 3: Cross multiply
    662,128.67x = 993,187.74 × 438,489.83
  4. Step 4: Simplify right side
    662,128.67x = 435,502,723,270.68
  5. Step 5: Solve for x
    x = 435,502,723,270.68/662,128.67
  6. Step 6: Final answer
    x = 657,731.26

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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.