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Finding the Fourth Proportional to 318,489.34, 439,529.74 and 197,669.54

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Solution

The fourth proportional to 318,489.34, 439,529.74 and 197,669.54 is: 272,792.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,489.34 : 439,529.74 = 197,669.54 : x
  2. Step 2: Convert to fraction form
    318,489.34/439,529.74 = 197,669.54/x
  3. Step 3: Cross multiply
    318,489.34x = 439,529.74 × 197,669.54
  4. Step 4: Simplify right side
    318,489.34x = 86,881,641,522.12
  5. Step 5: Solve for x
    x = 86,881,641,522.12/318,489.34
  6. Step 6: Final answer
    x = 272,792.93

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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.