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Finding the Fourth Proportional to 355,339.80, 533,009.70 and 215,371.80

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Solution

The fourth proportional to 355,339.80, 533,009.70 and 215,371.80 is: 323,057.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,339.80 : 533,009.70 = 215,371.80 : x
  2. Step 2: Convert to fraction form
    355,339.80/533,009.70 = 215,371.80/x
  3. Step 3: Cross multiply
    355,339.80x = 533,009.70 × 215,371.80
  4. Step 4: Simplify right side
    355,339.80x = 114,795,258,506.46
  5. Step 5: Solve for x
    x = 114,795,258,506.46/355,339.80
  6. Step 6: Final answer
    x = 323,057.70

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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.