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Finding the Fourth Proportional to 304,443.78, 420,339.15 and 189,768.30

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Solution

The fourth proportional to 304,443.78, 420,339.15 and 189,768.30 is: 262,009.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,443.78 : 420,339.15 = 189,768.30 : x
  2. Step 2: Convert to fraction form
    304,443.78/420,339.15 = 189,768.30/x
  3. Step 3: Cross multiply
    304,443.78x = 420,339.15 × 189,768.30
  4. Step 4: Simplify right side
    304,443.78x = 79,767,045,918.95
  5. Step 5: Solve for x
    x = 79,767,045,918.95/304,443.78
  6. Step 6: Final answer
    x = 262,009.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.