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Finding the Fourth Proportional to 279,342.47, 385,501.36 and 158,488.85

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Solution

The fourth proportional to 279,342.47, 385,501.36 and 158,488.85 is: 218,719.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,342.47 : 385,501.36 = 158,488.85 : x
  2. Step 2: Convert to fraction form
    279,342.47/385,501.36 = 158,488.85/x
  3. Step 3: Cross multiply
    279,342.47x = 385,501.36 × 158,488.85
  4. Step 4: Simplify right side
    279,342.47x = 61,097,667,219.84
  5. Step 5: Solve for x
    x = 61,097,667,219.84/279,342.47
  6. Step 6: Final answer
    x = 218,719.58

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1.5x scale

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.