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Finding the Fourth Proportional to 455,138.40, 681,942.15 and 360,003.90

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Solution

The fourth proportional to 455,138.40, 681,942.15 and 360,003.90 is: 539,400.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,138.40 : 681,942.15 = 360,003.90 : x
  2. Step 2: Convert to fraction form
    455,138.40/681,942.15 = 360,003.90/x
  3. Step 3: Cross multiply
    455,138.40x = 681,942.15 × 360,003.90
  4. Step 4: Simplify right side
    455,138.40x = 245,501,833,574.39
  5. Step 5: Solve for x
    x = 245,501,833,574.39/455,138.40
  6. Step 6: Final answer
    x = 539,400.40

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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.