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Finding the Fourth Proportional to 518,809.51, 778,238.12 and 158,954.59

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Solution

The fourth proportional to 518,809.51, 778,238.12 and 158,954.59 is: 238,439.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,809.51 : 778,238.12 = 158,954.59 : x
  2. Step 2: Convert to fraction form
    518,809.51/778,238.12 = 158,954.59/x
  3. Step 3: Cross multiply
    518,809.51x = 778,238.12 × 158,954.59
  4. Step 4: Simplify right side
    518,809.51x = 123,704,519,738.76
  5. Step 5: Solve for x
    x = 123,704,519,738.76/518,809.51
  6. Step 6: Final answer
    x = 238,439.19

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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.