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Finding the Fourth Proportional to 438,933.61, 658,400.41 and 123,390.51

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Solution

The fourth proportional to 438,933.61, 658,400.41 and 123,390.51 is: 185,085.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,933.61 : 658,400.41 = 123,390.51 : x
  2. Step 2: Convert to fraction form
    438,933.61/658,400.41 = 123,390.51/x
  3. Step 3: Cross multiply
    438,933.61x = 658,400.41 × 123,390.51
  4. Step 4: Simplify right side
    438,933.61x = 81,240,362,065.63
  5. Step 5: Solve for x
    x = 81,240,362,065.63/438,933.61
  6. Step 6: Final answer
    x = 185,085.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.