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Finding the Fourth Proportional to 559,778.21, 772,493.95 and 305,129.39

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Solution

The fourth proportional to 559,778.21, 772,493.95 and 305,129.39 is: 421,078.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,778.21 : 772,493.95 = 305,129.39 : x
  2. Step 2: Convert to fraction form
    559,778.21/772,493.95 = 305,129.39/x
  3. Step 3: Cross multiply
    559,778.21x = 772,493.95 × 305,129.39
  4. Step 4: Simplify right side
    559,778.21x = 235,710,606,216.54
  5. Step 5: Solve for x
    x = 235,710,606,216.54/559,778.21
  6. Step 6: Final answer
    x = 421,078.57

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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.