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Finding the Fourth Proportional to 667,968.51, 921,698.15 and 406,190.28

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Solution

The fourth proportional to 667,968.51, 921,698.15 and 406,190.28 is: 560,482.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,968.51 : 921,698.15 = 406,190.28 : x
  2. Step 2: Convert to fraction form
    667,968.51/921,698.15 = 406,190.28/x
  3. Step 3: Cross multiply
    667,968.51x = 921,698.15 × 406,190.28
  4. Step 4: Simplify right side
    667,968.51x = 374,384,827,593.03
  5. Step 5: Solve for x
    x = 374,384,827,593.03/667,968.51
  6. Step 6: Final answer
    x = 560,482.75

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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.