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Finding the Fourth Proportional to 265,555.02, 398,394.79 and 105,640.03

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Solution

The fourth proportional to 265,555.02, 398,394.79 and 105,640.03 is: 158,484.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,555.02 : 398,394.79 = 105,640.03 : x
  2. Step 2: Convert to fraction form
    265,555.02/398,394.79 = 105,640.03/x
  3. Step 3: Cross multiply
    265,555.02x = 398,394.79 × 105,640.03
  4. Step 4: Simplify right side
    265,555.02x = 42,086,437,801.34
  5. Step 5: Solve for x
    x = 42,086,437,801.34/265,555.02
  6. Step 6: Final answer
    x = 158,484.81

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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.