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Finding the Fourth Proportional to 212,741.70, 319,112.55 and 192,005.70

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Solution

The fourth proportional to 212,741.70, 319,112.55 and 192,005.70 is: 288,008.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,741.70 : 319,112.55 = 192,005.70 : x
  2. Step 2: Convert to fraction form
    212,741.70/319,112.55 = 192,005.70/x
  3. Step 3: Cross multiply
    212,741.70x = 319,112.55 × 192,005.70
  4. Step 4: Simplify right side
    212,741.70x = 61,271,428,541.54
  5. Step 5: Solve for x
    x = 61,271,428,541.54/212,741.70
  6. Step 6: Final answer
    x = 288,008.55

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1.5x scale

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.