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Finding the Fourth Proportional to 260,475.48, 390,713.16 and 120,157.56

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Solution

The fourth proportional to 260,475.48, 390,713.16 and 120,157.56 is: 180,236.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,475.48 : 390,713.16 = 120,157.56 : x
  2. Step 2: Convert to fraction form
    260,475.48/390,713.16 = 120,157.56/x
  3. Step 3: Cross multiply
    260,475.48x = 390,713.16 × 120,157.56
  4. Step 4: Simplify right side
    260,475.48x = 46,947,139,965.49
  5. Step 5: Solve for x
    x = 46,947,139,965.49/260,475.48
  6. Step 6: Final answer
    x = 180,236.31

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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.