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Finding the Fourth Proportional to 666,720, 920,073.60 and 364,914

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Solution

The fourth proportional to 666,720, 920,073.60 and 364,914 is: 503,581.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,720 : 920,073.60 = 364,914 : x
  2. Step 2: Convert to fraction form
    666,720/920,073.60 = 364,914/x
  3. Step 3: Cross multiply
    666,720x = 920,073.60 × 364,914
  4. Step 4: Simplify right side
    666,720x = 335,747,737,670.40
  5. Step 5: Solve for x
    x = 335,747,737,670.40/666,720
  6. Step 6: Final answer
    x = 503,581.32

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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.