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Finding the Fourth Proportional to 559,780.70, 772,497.39 and 305,131.89

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Solution

The fourth proportional to 559,780.70, 772,497.39 and 305,131.89 is: 421,082.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,780.70 : 772,497.39 = 305,131.89 : x
  2. Step 2: Convert to fraction form
    559,780.70/772,497.39 = 305,131.89/x
  3. Step 3: Cross multiply
    559,780.70x = 772,497.39 × 305,131.89
  4. Step 4: Simplify right side
    559,780.70x = 235,713,588,630.77
  5. Step 5: Solve for x
    x = 235,713,588,630.77/559,780.70
  6. Step 6: Final answer
    x = 421,082.02

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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.