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Finding the Fourth Proportional to 210,921.60, 315,921.60 and 163,804.80

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Solution

The fourth proportional to 210,921.60, 315,921.60 and 163,804.80 is: 245,349.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,921.60 : 315,921.60 = 163,804.80 : x
  2. Step 2: Convert to fraction form
    210,921.60/315,921.60 = 163,804.80/x
  3. Step 3: Cross multiply
    210,921.60x = 315,921.60 × 163,804.80
  4. Step 4: Simplify right side
    210,921.60x = 51,749,474,503.68
  5. Step 5: Solve for x
    x = 51,749,474,503.68/210,921.60
  6. Step 6: Final answer
    x = 245,349.34

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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.