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Finding the Fourth Proportional to 370,859.40, 556,289.10 and 221,268.60

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Solution

The fourth proportional to 370,859.40, 556,289.10 and 221,268.60 is: 331,902.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,859.40 : 556,289.10 = 221,268.60 : x
  2. Step 2: Convert to fraction form
    370,859.40/556,289.10 = 221,268.60/x
  3. Step 3: Cross multiply
    370,859.40x = 556,289.10 × 221,268.60
  4. Step 4: Simplify right side
    370,859.40x = 123,089,310,352.26
  5. Step 5: Solve for x
    x = 123,089,310,352.26/370,859.40
  6. Step 6: Final answer
    x = 331,902.90

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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.