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Finding the Fourth Proportional to 606,485.20, 908,415.60 and 393,908.80

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Solution

The fourth proportional to 606,485.20, 908,415.60 and 393,908.80 is: 590,010.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,485.20 : 908,415.60 = 393,908.80 : x
  2. Step 2: Convert to fraction form
    606,485.20/908,415.60 = 393,908.80/x
  3. Step 3: Cross multiply
    606,485.20x = 908,415.60 × 393,908.80
  4. Step 4: Simplify right side
    606,485.20x = 357,832,898,897.28
  5. Step 5: Solve for x
    x = 357,832,898,897.28/606,485.20
  6. Step 6: Final answer
    x = 590,010.93

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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.