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Finding the Fourth Proportional to 539,330.78, 808,745.88 and 314,755.86

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Solution

The fourth proportional to 539,330.78, 808,745.88 and 314,755.86 is: 471,987.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,330.78 : 808,745.88 = 314,755.86 : x
  2. Step 2: Convert to fraction form
    539,330.78/808,745.88 = 314,755.86/x
  3. Step 3: Cross multiply
    539,330.78x = 808,745.88 × 314,755.86
  4. Step 4: Simplify right side
    539,330.78x = 254,557,504,980.86
  5. Step 5: Solve for x
    x = 254,557,504,980.86/539,330.78
  6. Step 6: Final answer
    x = 471,987.72

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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.