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Finding the Fourth Proportional to 235,913.40, 353,639.70 and 211,030.20

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Solution

The fourth proportional to 235,913.40, 353,639.70 and 211,030.20 is: 316,339.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,913.40 : 353,639.70 = 211,030.20 : x
  2. Step 2: Convert to fraction form
    235,913.40/353,639.70 = 211,030.20/x
  3. Step 3: Cross multiply
    235,913.40x = 353,639.70 × 211,030.20
  4. Step 4: Simplify right side
    235,913.40x = 74,628,656,618.94
  5. Step 5: Solve for x
    x = 74,628,656,618.94/235,913.40
  6. Step 6: Final answer
    x = 316,339.20

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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.