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Finding the Fourth Proportional to 645,543, 890,849.34 and 377,271

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Solution

The fourth proportional to 645,543, 890,849.34 and 377,271 is: 520,633.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,543 : 890,849.34 = 377,271 : x
  2. Step 2: Convert to fraction form
    645,543/890,849.34 = 377,271/x
  3. Step 3: Cross multiply
    645,543x = 890,849.34 × 377,271
  4. Step 4: Simplify right side
    645,543x = 336,091,621,351.14
  5. Step 5: Solve for x
    x = 336,091,621,351.14/645,543
  6. Step 6: Final answer
    x = 520,633.98

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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.