Home / 387,828.87-581,726.39-121,583.31

Finding the Fourth Proportional to 387,828.87, 581,726.39 and 121,583.31

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Solution

The fourth proportional to 387,828.87, 581,726.39 and 121,583.31 is: 182,369.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,828.87 : 581,726.39 = 121,583.31 : x
  2. Step 2: Convert to fraction form
    387,828.87/581,726.39 = 121,583.31/x
  3. Step 3: Cross multiply
    387,828.87x = 581,726.39 × 121,583.31
  4. Step 4: Simplify right side
    387,828.87x = 70,728,219,402.63
  5. Step 5: Solve for x
    x = 70,728,219,402.63/387,828.87
  6. Step 6: Final answer
    x = 182,369.66

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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.