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Finding the Fourth Proportional to 310,531.20, 465,796.80 and 210,147.90

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Solution

The fourth proportional to 310,531.20, 465,796.80 and 210,147.90 is: 315,221.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,531.20 : 465,796.80 = 210,147.90 : x
  2. Step 2: Convert to fraction form
    310,531.20/465,796.80 = 210,147.90/x
  3. Step 3: Cross multiply
    310,531.20x = 465,796.80 × 210,147.90
  4. Step 4: Simplify right side
    310,531.20x = 97,886,219,346.72
  5. Step 5: Solve for x
    x = 97,886,219,346.72/310,531.20
  6. Step 6: Final answer
    x = 315,221.85

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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.