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Finding the Fourth Proportional to 561,618.81, 775,032.84 and 319,901.31

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Solution

The fourth proportional to 561,618.81, 775,032.84 and 319,901.31 is: 441,463.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,618.81 : 775,032.84 = 319,901.31 : x
  2. Step 2: Convert to fraction form
    561,618.81/775,032.84 = 319,901.31/x
  3. Step 3: Cross multiply
    561,618.81x = 775,032.84 × 319,901.31
  4. Step 4: Simplify right side
    561,618.81x = 247,934,020,809.02
  5. Step 5: Solve for x
    x = 247,934,020,809.02/561,618.81
  6. Step 6: Final answer
    x = 441,463.17

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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.