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Finding the Fourth Proportional to 667,404.80, 921,030.40 and 365,579.20

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Solution

The fourth proportional to 667,404.80, 921,030.40 and 365,579.20 is: 504,505.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,404.80 : 921,030.40 = 365,579.20 : x
  2. Step 2: Convert to fraction form
    667,404.80/921,030.40 = 365,579.20/x
  3. Step 3: Cross multiply
    667,404.80x = 921,030.40 × 365,579.20
  4. Step 4: Simplify right side
    667,404.80x = 336,709,556,807.68
  5. Step 5: Solve for x
    x = 336,709,556,807.68/667,404.80
  6. Step 6: Final answer
    x = 504,505.75

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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.