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Finding the Fourth Proportional to 559,665.37, 772,340.79 and 317,961.21

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Solution

The fourth proportional to 559,665.37, 772,340.79 and 317,961.21 is: 438,787.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,665.37 : 772,340.79 = 317,961.21 : x
  2. Step 2: Convert to fraction form
    559,665.37/772,340.79 = 317,961.21/x
  3. Step 3: Cross multiply
    559,665.37x = 772,340.79 × 317,961.21
  4. Step 4: Simplify right side
    559,665.37x = 245,574,412,120.76
  5. Step 5: Solve for x
    x = 245,574,412,120.76/559,665.37
  6. Step 6: Final answer
    x = 438,787.94

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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.