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Finding the Fourth Proportional to 210,614.40, 315,921.60 and 209,302.20

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Solution

The fourth proportional to 210,614.40, 315,921.60 and 209,302.20 is: 313,953.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,614.40 : 315,921.60 = 209,302.20 : x
  2. Step 2: Convert to fraction form
    210,614.40/315,921.60 = 209,302.20/x
  3. Step 3: Cross multiply
    210,614.40x = 315,921.60 × 209,302.20
  4. Step 4: Simplify right side
    210,614.40x = 66,123,085,907.52
  5. Step 5: Solve for x
    x = 66,123,085,907.52/210,614.40
  6. Step 6: Final answer
    x = 313,953.30

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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.