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Finding the Fourth Proportional to 259,917.40, 390,048.90 and 147,597.40

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Solution

The fourth proportional to 259,917.40, 390,048.90 and 147,597.40 is: 221,494.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,917.40 : 390,048.90 = 147,597.40 : x
  2. Step 2: Convert to fraction form
    259,917.40/390,048.90 = 147,597.40/x
  3. Step 3: Cross multiply
    259,917.40x = 390,048.90 × 147,597.40
  4. Step 4: Simplify right side
    259,917.40x = 57,570,203,512.86
  5. Step 5: Solve for x
    x = 57,570,203,512.86/259,917.40
  6. Step 6: Final answer
    x = 221,494.23

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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.