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Finding the Fourth Proportional to 387,346.50, 581,041.62 and 138,028.50

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Solution

The fourth proportional to 387,346.50, 581,041.62 and 138,028.50 is: 207,050.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,346.50 : 581,041.62 = 138,028.50 : x
  2. Step 2: Convert to fraction form
    387,346.50/581,041.62 = 138,028.50/x
  3. Step 3: Cross multiply
    387,346.50x = 581,041.62 × 138,028.50
  4. Step 4: Simplify right side
    387,346.50x = 80,200,303,246.17
  5. Step 5: Solve for x
    x = 80,200,303,246.17/387,346.50
  6. Step 6: Final answer
    x = 207,050.54

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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.