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Finding the Fourth Proportional to 268,619.76, 370,707.84 and 155,420.64

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Solution

The fourth proportional to 268,619.76, 370,707.84 and 155,420.64 is: 214,487.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,619.76 : 370,707.84 = 155,420.64 : x
  2. Step 2: Convert to fraction form
    268,619.76/370,707.84 = 155,420.64/x
  3. Step 3: Cross multiply
    268,619.76x = 370,707.84 × 155,420.64
  4. Step 4: Simplify right side
    268,619.76x = 57,615,649,745.82
  5. Step 5: Solve for x
    x = 57,615,649,745.82/268,619.76
  6. Step 6: Final answer
    x = 214,487.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.