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Finding the Fourth Proportional to 260,043.90, 390,357.45 and 201,140.70

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Solution

The fourth proportional to 260,043.90, 390,357.45 and 201,140.70 is: 301,936.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,043.90 : 390,357.45 = 201,140.70 : x
  2. Step 2: Convert to fraction form
    260,043.90/390,357.45 = 201,140.70/x
  3. Step 3: Cross multiply
    260,043.90x = 390,357.45 × 201,140.70
  4. Step 4: Simplify right side
    260,043.90x = 78,516,770,743.22
  5. Step 5: Solve for x
    x = 78,516,770,743.22/260,043.90
  6. Step 6: Final answer
    x = 301,936.60

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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.