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Finding the Fourth Proportional to 707,690.40, 976,619.04 and 385,401.96

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Solution

The fourth proportional to 707,690.40, 976,619.04 and 385,401.96 is: 531,858.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,690.40 : 976,619.04 = 385,401.96 : x
  2. Step 2: Convert to fraction form
    707,690.40/976,619.04 = 385,401.96/x
  3. Step 3: Cross multiply
    707,690.40x = 976,619.04 × 385,401.96
  4. Step 4: Simplify right side
    707,690.40x = 376,390,892,189.32
  5. Step 5: Solve for x
    x = 376,390,892,189.32/707,690.40
  6. Step 6: Final answer
    x = 531,858.13

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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.