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Finding the Fourth Proportional to 210,620.60, 315,930.90 and 130,904.45

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Solution

The fourth proportional to 210,620.60, 315,930.90 and 130,904.45 is: 196,356.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,620.60 : 315,930.90 = 130,904.45 : x
  2. Step 2: Convert to fraction form
    210,620.60/315,930.90 = 130,904.45/x
  3. Step 3: Cross multiply
    210,620.60x = 315,930.90 × 130,904.45
  4. Step 4: Simplify right side
    210,620.60x = 41,356,760,702.51
  5. Step 5: Solve for x
    x = 41,356,760,702.51/210,620.60
  6. Step 6: Final answer
    x = 196,356.68

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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.