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Finding the Fourth Proportional to 713,379.63, 984,442.56 and 391,078.71

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Solution

The fourth proportional to 713,379.63, 984,442.56 and 391,078.71 is: 539,676.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,379.63 : 984,442.56 = 391,078.71 : x
  2. Step 2: Convert to fraction form
    713,379.63/984,442.56 = 391,078.71/x
  3. Step 3: Cross multiply
    713,379.63x = 984,442.56 × 391,078.71
  4. Step 4: Simplify right side
    713,379.63x = 384,994,526,433.90
  5. Step 5: Solve for x
    x = 384,994,526,433.90/713,379.63
  6. Step 6: Final answer
    x = 539,676.93

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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.