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Finding the Fourth Proportional to 260,405.70, 359,392.92 and 145,690.74

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Solution

The fourth proportional to 260,405.70, 359,392.92 and 145,690.74 is: 201,071.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,405.70 : 359,392.92 = 145,690.74 : x
  2. Step 2: Convert to fraction form
    260,405.70/359,392.92 = 145,690.74/x
  3. Step 3: Cross multiply
    260,405.70x = 359,392.92 × 145,690.74
  4. Step 4: Simplify right side
    260,405.70x = 52,360,220,465.56
  5. Step 5: Solve for x
    x = 52,360,220,465.56/260,405.70
  6. Step 6: Final answer
    x = 201,071.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.