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Finding the Fourth Proportional to 298,509.51, 447,823.35 and 85,279.26

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Solution

The fourth proportional to 298,509.51, 447,823.35 and 85,279.26 is: 127,935.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,509.51 : 447,823.35 = 85,279.26 : x
  2. Step 2: Convert to fraction form
    298,509.51/447,823.35 = 85,279.26/x
  3. Step 3: Cross multiply
    298,509.51x = 447,823.35 × 85,279.26
  4. Step 4: Simplify right side
    298,509.51x = 38,190,043,898.72
  5. Step 5: Solve for x
    x = 38,190,043,898.72/298,509.51
  6. Step 6: Final answer
    x = 127,935.77

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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.