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Finding the Fourth Proportional to 343,804.32, 515,731.32 and 143,923.68

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Solution

The fourth proportional to 343,804.32, 515,731.32 and 143,923.68 is: 215,895.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,804.32 : 515,731.32 = 143,923.68 : x
  2. Step 2: Convert to fraction form
    343,804.32/515,731.32 = 143,923.68/x
  3. Step 3: Cross multiply
    343,804.32x = 515,731.32 × 143,923.68
  4. Step 4: Simplify right side
    343,804.32x = 74,225,949,465.66
  5. Step 5: Solve for x
    x = 74,225,949,465.66/343,804.32
  6. Step 6: Final answer
    x = 215,895.92

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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.