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Finding the Fourth Proportional to 210,905.60, 315,897.60 and 163,788.80

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Solution

The fourth proportional to 210,905.60, 315,897.60 and 163,788.80 is: 245,325.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,905.60 : 315,897.60 = 163,788.80 : x
  2. Step 2: Convert to fraction form
    210,905.60/315,897.60 = 163,788.80/x
  3. Step 3: Cross multiply
    210,905.60x = 315,897.60 × 163,788.80
  4. Step 4: Simplify right side
    210,905.60x = 51,740,488,826.88
  5. Step 5: Solve for x
    x = 51,740,488,826.88/210,905.60
  6. Step 6: Final answer
    x = 245,325.34

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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.