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Finding the Fourth Proportional to 260,039.60, 390,059.40 and 235,156.40

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Solution

The fourth proportional to 260,039.60, 390,059.40 and 235,156.40 is: 352,734.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,039.60 : 390,059.40 = 235,156.40 : x
  2. Step 2: Convert to fraction form
    260,039.60/390,059.40 = 235,156.40/x
  3. Step 3: Cross multiply
    260,039.60x = 390,059.40 × 235,156.40
  4. Step 4: Simplify right side
    260,039.60x = 91,724,964,290.16
  5. Step 5: Solve for x
    x = 91,724,964,290.16/260,039.60
  6. Step 6: Final answer
    x = 352,734.60

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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.