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Finding the Fourth Proportional to 658,835.72, 908,842.72 and 400,791.60

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Solution

The fourth proportional to 658,835.72, 908,842.72 and 400,791.60 is: 552,879.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,835.72 : 908,842.72 = 400,791.60 : x
  2. Step 2: Convert to fraction form
    658,835.72/908,842.72 = 400,791.60/x
  3. Step 3: Cross multiply
    658,835.72x = 908,842.72 × 400,791.60
  4. Step 4: Simplify right side
    658,835.72x = 364,256,527,897.15
  5. Step 5: Solve for x
    x = 364,256,527,897.15/658,835.72
  6. Step 6: Final answer
    x = 552,879.14

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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.