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Finding the Fourth Proportional to 343,321.40, 515,030.70 and 106,639.40

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Solution

The fourth proportional to 343,321.40, 515,030.70 and 106,639.40 is: 159,974.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,321.40 : 515,030.70 = 106,639.40 : x
  2. Step 2: Convert to fraction form
    343,321.40/515,030.70 = 106,639.40/x
  3. Step 3: Cross multiply
    343,321.40x = 515,030.70 × 106,639.40
  4. Step 4: Simplify right side
    343,321.40x = 54,922,564,829.58
  5. Step 5: Solve for x
    x = 54,922,564,829.58/343,321.40
  6. Step 6: Final answer
    x = 159,974.20

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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.