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Finding the Fourth Proportional to 265,455.81, 398,089.91 and 85,534.04

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Solution

The fourth proportional to 265,455.81, 398,089.91 and 85,534.04 is: 128,270.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,455.81 : 398,089.91 = 85,534.04 : x
  2. Step 2: Convert to fraction form
    265,455.81/398,089.91 = 85,534.04/x
  3. Step 3: Cross multiply
    265,455.81x = 398,089.91 × 85,534.04
  4. Step 4: Simplify right side
    265,455.81x = 34,050,239,494.60
  5. Step 5: Solve for x
    x = 34,050,239,494.60/265,455.81
  6. Step 6: Final answer
    x = 128,270.84

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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.