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Finding the Fourth Proportional to 212,858.80, 319,288.20 and 195,655.60

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Solution

The fourth proportional to 212,858.80, 319,288.20 and 195,655.60 is: 293,483.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,858.80 : 319,288.20 = 195,655.60 : x
  2. Step 2: Convert to fraction form
    212,858.80/319,288.20 = 195,655.60/x
  3. Step 3: Cross multiply
    212,858.80x = 319,288.20 × 195,655.60
  4. Step 4: Simplify right side
    212,858.80x = 62,470,524,343.92
  5. Step 5: Solve for x
    x = 62,470,524,343.92/212,858.80
  6. Step 6: Final answer
    x = 293,483.40

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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.