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Finding the Fourth Proportional to 667,975.51, 921,707.79 and 406,197.28

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Solution

The fourth proportional to 667,975.51, 921,707.79 and 406,197.28 is: 560,492.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,975.51 : 921,707.79 = 406,197.28 : x
  2. Step 2: Convert to fraction form
    667,975.51/921,707.79 = 406,197.28/x
  3. Step 3: Cross multiply
    667,975.51x = 921,707.79 × 406,197.28
  4. Step 4: Simplify right side
    667,975.51x = 374,395,197,252.81
  5. Step 5: Solve for x
    x = 374,395,197,252.81/667,975.51
  6. Step 6: Final answer
    x = 560,492.40

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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.