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Finding the Fourth Proportional to 667,620.76, 921,316.86 and 361,699.25

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Solution

The fourth proportional to 667,620.76, 921,316.86 and 361,699.25 is: 499,145.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,620.76 : 921,316.86 = 361,699.25 : x
  2. Step 2: Convert to fraction form
    667,620.76/921,316.86 = 361,699.25/x
  3. Step 3: Cross multiply
    667,620.76x = 921,316.86 × 361,699.25
  4. Step 4: Simplify right side
    667,620.76x = 333,239,617,274.36
  5. Step 5: Solve for x
    x = 333,239,617,274.36/667,620.76
  6. Step 6: Final answer
    x = 499,145.08

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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.