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Finding the Fourth Proportional to 260,046.40, 389,486.40 and 213,390.40

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Solution

The fourth proportional to 260,046.40, 389,486.40 and 213,390.40 is: 319,607.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,046.40 : 389,486.40 = 213,390.40 : x
  2. Step 2: Convert to fraction form
    260,046.40/389,486.40 = 213,390.40/x
  3. Step 3: Cross multiply
    260,046.40x = 389,486.40 × 213,390.40
  4. Step 4: Simplify right side
    260,046.40x = 83,112,658,690.56
  5. Step 5: Solve for x
    x = 83,112,658,690.56/260,046.40
  6. Step 6: Final answer
    x = 319,607.03

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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.