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Finding the Fourth Proportional to 539,018.74, 808,209.78 and 239,356

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Solution

The fourth proportional to 539,018.74, 808,209.78 and 239,356 is: 358,892.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,018.74 : 808,209.78 = 239,356 : x
  2. Step 2: Convert to fraction form
    539,018.74/808,209.78 = 239,356/x
  3. Step 3: Cross multiply
    539,018.74x = 808,209.78 × 239,356
  4. Step 4: Simplify right side
    539,018.74x = 193,449,860,101.68
  5. Step 5: Solve for x
    x = 193,449,860,101.68/539,018.74
  6. Step 6: Final answer
    x = 358,892.64

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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.