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Finding the Fourth Proportional to 279,509.63, 385,721.66 and 158,673.83

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Solution

The fourth proportional to 279,509.63, 385,721.66 and 158,673.83 is: 218,968.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,509.63 : 385,721.66 = 158,673.83 : x
  2. Step 2: Convert to fraction form
    279,509.63/385,721.66 = 158,673.83/x
  3. Step 3: Cross multiply
    279,509.63x = 385,721.66 × 158,673.83
  4. Step 4: Simplify right side
    279,509.63x = 61,203,931,574.23
  5. Step 5: Solve for x
    x = 61,203,931,574.23/279,509.63
  6. Step 6: Final answer
    x = 218,968.96

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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.