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Finding the Fourth Proportional to 559,777.70, 772,493.25 and 305,128.89

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Solution

The fourth proportional to 559,777.70, 772,493.25 and 305,128.89 is: 421,077.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,777.70 : 772,493.25 = 305,128.89 : x
  2. Step 2: Convert to fraction form
    559,777.70/772,493.25 = 305,128.89/x
  3. Step 3: Cross multiply
    559,777.70x = 772,493.25 × 305,128.89
  4. Step 4: Simplify right side
    559,777.70x = 235,710,009,049.23
  5. Step 5: Solve for x
    x = 235,710,009,049.23/559,777.70
  6. Step 6: Final answer
    x = 421,077.88

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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.