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Finding the Fourth Proportional to 693,394.94, 957,179.72 and 421,549.64

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Solution

The fourth proportional to 693,394.94, 957,179.72 and 421,549.64 is: 581,917.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,394.94 : 957,179.72 = 421,549.64 : x
  2. Step 2: Convert to fraction form
    693,394.94/957,179.72 = 421,549.64/x
  3. Step 3: Cross multiply
    693,394.94x = 957,179.72 × 421,549.64
  4. Step 4: Simplify right side
    693,394.94x = 403,498,759,487.65
  5. Step 5: Solve for x
    x = 403,498,759,487.65/693,394.94
  6. Step 6: Final answer
    x = 581,917.66

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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.