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Finding the Fourth Proportional to 892,980.78, 1,339,482.24 and 261,907.62

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Solution

The fourth proportional to 892,980.78, 1,339,482.24 and 261,907.62 is: 392,864.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    892,980.78 : 1,339,482.24 = 261,907.62 : x
  2. Step 2: Convert to fraction form
    892,980.78/1,339,482.24 = 261,907.62/x
  3. Step 3: Cross multiply
    892,980.78x = 1,339,482.24 × 261,907.62
  4. Step 4: Simplify right side
    892,980.78x = 350,820,605,510.67
  5. Step 5: Solve for x
    x = 350,820,605,510.67/892,980.78
  6. Step 6: Final answer
    x = 392,864.68

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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.