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Finding the Fourth Proportional to 521,628.85, 719,874.86 and 292,172.71

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Solution

The fourth proportional to 521,628.85, 719,874.86 and 292,172.71 is: 403,213.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,628.85 : 719,874.86 = 292,172.71 : x
  2. Step 2: Convert to fraction form
    521,628.85/719,874.86 = 292,172.71/x
  3. Step 3: Cross multiply
    521,628.85x = 719,874.86 × 292,172.71
  4. Step 4: Simplify right side
    521,628.85x = 210,327,788,707.07
  5. Step 5: Solve for x
    x = 210,327,788,707.07/521,628.85
  6. Step 6: Final answer
    x = 403,213.49

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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.