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Finding the Fourth Proportional to 707,418.40, 976,218.96 and 385,134.88

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Solution

The fourth proportional to 707,418.40, 976,218.96 and 385,134.88 is: 531,476.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,418.40 : 976,218.96 = 385,134.88 : x
  2. Step 2: Convert to fraction form
    707,418.40/976,218.96 = 385,134.88/x
  3. Step 3: Cross multiply
    707,418.40x = 976,218.96 × 385,134.88
  4. Step 4: Simplify right side
    707,418.40x = 375,975,972,013.33
  5. Step 5: Solve for x
    x = 375,975,972,013.33/707,418.40
  6. Step 6: Final answer
    x = 531,476.10

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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.