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Finding the Fourth Proportional to 387,701.64, 581,580.18 and 103,390.68

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Solution

The fourth proportional to 387,701.64, 581,580.18 and 103,390.68 is: 155,093.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,701.64 : 581,580.18 = 103,390.68 : x
  2. Step 2: Convert to fraction form
    387,701.64/581,580.18 = 103,390.68/x
  3. Step 3: Cross multiply
    387,701.64x = 581,580.18 × 103,390.68
  4. Step 4: Simplify right side
    387,701.64x = 60,129,970,284.72
  5. Step 5: Solve for x
    x = 60,129,970,284.72/387,701.64
  6. Step 6: Final answer
    x = 155,093.41

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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.