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Finding the Fourth Proportional to 260,090.40, 390,135.60 and 190,106.40

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Solution

The fourth proportional to 260,090.40, 390,135.60 and 190,106.40 is: 285,159.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,090.40 : 390,135.60 = 190,106.40 : x
  2. Step 2: Convert to fraction form
    260,090.40/390,135.60 = 190,106.40/x
  3. Step 3: Cross multiply
    260,090.40x = 390,135.60 × 190,106.40
  4. Step 4: Simplify right side
    260,090.40x = 74,167,274,427.84
  5. Step 5: Solve for x
    x = 74,167,274,427.84/260,090.40
  6. Step 6: Final answer
    x = 285,159.60

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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.