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Finding the Fourth Proportional to 667,264.65, 920,976.11 and 521,782.57

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Solution

The fourth proportional to 667,264.65, 920,976.11 and 521,782.57 is: 720,177.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,264.65 : 920,976.11 = 521,782.57 : x
  2. Step 2: Convert to fraction form
    667,264.65/920,976.11 = 521,782.57/x
  3. Step 3: Cross multiply
    667,264.65x = 920,976.11 × 521,782.57
  4. Step 4: Simplify right side
    667,264.65x = 480,549,281,584.40
  5. Step 5: Solve for x
    x = 480,549,281,584.40/667,264.65
  6. Step 6: Final answer
    x = 720,177.94

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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.