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Finding the Fourth Proportional to 387,626.94, 581,394.12 and 103,338.81

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Solution

The fourth proportional to 387,626.94, 581,394.12 and 103,338.81 is: 154,995.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,626.94 : 581,394.12 = 103,338.81 : x
  2. Step 2: Convert to fraction form
    387,626.94/581,394.12 = 103,338.81/x
  3. Step 3: Cross multiply
    387,626.94x = 581,394.12 × 103,338.81
  4. Step 4: Simplify right side
    387,626.94x = 60,080,576,501.80
  5. Step 5: Solve for x
    x = 60,080,576,501.80/387,626.94
  6. Step 6: Final answer
    x = 154,995.87

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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.