Home / 745,286.40-1,117,843.20-212,889.60

Finding the Fourth Proportional to 745,286.40, 1,117,843.20 and 212,889.60

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Solution

The fourth proportional to 745,286.40, 1,117,843.20 and 212,889.60 is: 319,309.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,286.40 : 1,117,843.20 = 212,889.60 : x
  2. Step 2: Convert to fraction form
    745,286.40/1,117,843.20 = 212,889.60/x
  3. Step 3: Cross multiply
    745,286.40x = 1,117,843.20 × 212,889.60
  4. Step 4: Simplify right side
    745,286.40x = 237,977,191,710.72
  5. Step 5: Solve for x
    x = 237,977,191,710.72/745,286.40
  6. Step 6: Final answer
    x = 319,309.72

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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.