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Finding the Fourth Proportional to 560,490.36, 773,499.94 and 318,815.48

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Solution

The fourth proportional to 560,490.36, 773,499.94 and 318,815.48 is: 439,978.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,490.36 : 773,499.94 = 318,815.48 : x
  2. Step 2: Convert to fraction form
    560,490.36/773,499.94 = 318,815.48/x
  3. Step 3: Cross multiply
    560,490.36x = 773,499.94 × 318,815.48
  4. Step 4: Simplify right side
    560,490.36x = 246,603,754,651.07
  5. Step 5: Solve for x
    x = 246,603,754,651.07/560,490.36
  6. Step 6: Final answer
    x = 439,978.58

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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.