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Finding the Fourth Proportional to 559,680.78, 772,380.34 and 318,004.28

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Solution

The fourth proportional to 559,680.78, 772,380.34 and 318,004.28 is: 438,857.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,680.78 : 772,380.34 = 318,004.28 : x
  2. Step 2: Convert to fraction form
    559,680.78/772,380.34 = 318,004.28/x
  3. Step 3: Cross multiply
    559,680.78x = 772,380.34 × 318,004.28
  4. Step 4: Simplify right side
    559,680.78x = 245,620,253,907.86
  5. Step 5: Solve for x
    x = 245,620,253,907.86/559,680.78
  6. Step 6: Final answer
    x = 438,857.76

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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.