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Finding the Fourth Proportional to 548,818.80, 757,405.08 and 307,129.20

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Solution

The fourth proportional to 548,818.80, 757,405.08 and 307,129.20 is: 423,857.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,818.80 : 757,405.08 = 307,129.20 : x
  2. Step 2: Convert to fraction form
    548,818.80/757,405.08 = 307,129.20/x
  3. Step 3: Cross multiply
    548,818.80x = 757,405.08 × 307,129.20
  4. Step 4: Simplify right side
    548,818.80x = 232,621,216,296.34
  5. Step 5: Solve for x
    x = 232,621,216,296.34/548,818.80
  6. Step 6: Final answer
    x = 423,857.96

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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.