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Finding the Fourth Proportional to 310,489.08, 428,224.32 and 208,483.80

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Solution

The fourth proportional to 310,489.08, 428,224.32 and 208,483.80 is: 287,539.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,489.08 : 428,224.32 = 208,483.80 : x
  2. Step 2: Convert to fraction form
    310,489.08/428,224.32 = 208,483.80/x
  3. Step 3: Cross multiply
    310,489.08x = 428,224.32 × 208,483.80
  4. Step 4: Simplify right side
    310,489.08x = 89,277,833,486.02
  5. Step 5: Solve for x
    x = 89,277,833,486.02/310,489.08
  6. Step 6: Final answer
    x = 287,539.37

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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.