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Finding the Fourth Proportional to 368,996.28, 553,509 and 102,780.06

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Solution

The fourth proportional to 368,996.28, 553,509 and 102,780.06 is: 154,174.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,996.28 : 553,509 = 102,780.06 : x
  2. Step 2: Convert to fraction form
    368,996.28/553,509 = 102,780.06/x
  3. Step 3: Cross multiply
    368,996.28x = 553,509 × 102,780.06
  4. Step 4: Simplify right side
    368,996.28x = 56,889,688,230.54
  5. Step 5: Solve for x
    x = 56,889,688,230.54/368,996.28
  6. Step 6: Final answer
    x = 154,174.15

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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.