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Finding the Fourth Proportional to 667,620, 921,315.60 and 365,807.52

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Solution

The fourth proportional to 667,620, 921,315.60 and 365,807.52 is: 504,814.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,620 : 921,315.60 = 365,807.52 : x
  2. Step 2: Convert to fraction form
    667,620/921,315.60 = 365,807.52/x
  3. Step 3: Cross multiply
    667,620x = 921,315.60 × 365,807.52
  4. Step 4: Simplify right side
    667,620x = 337,024,174,773.31
  5. Step 5: Solve for x
    x = 337,024,174,773.31/667,620
  6. Step 6: Final answer
    x = 504,814.38

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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.