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Finding the Fourth Proportional to 401,543.26, 602,370.45 and 135,379.89

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Solution

The fourth proportional to 401,543.26, 602,370.45 and 135,379.89 is: 203,088.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,543.26 : 602,370.45 = 135,379.89 : x
  2. Step 2: Convert to fraction form
    401,543.26/602,370.45 = 135,379.89/x
  3. Step 3: Cross multiply
    401,543.26x = 602,370.45 × 135,379.89
  4. Step 4: Simplify right side
    401,543.26x = 81,548,845,260.25
  5. Step 5: Solve for x
    x = 81,548,845,260.25/401,543.26
  6. Step 6: Final answer
    x = 203,088.57

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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.