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Finding the Fourth Proportional to 289,293.21, 399,131.73 and 187,396.74

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Solution

The fourth proportional to 289,293.21, 399,131.73 and 187,396.74 is: 258,547.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,293.21 : 399,131.73 = 187,396.74 : x
  2. Step 2: Convert to fraction form
    289,293.21/399,131.73 = 187,396.74/x
  3. Step 3: Cross multiply
    289,293.21x = 399,131.73 × 187,396.74
  4. Step 4: Simplify right side
    289,293.21x = 74,795,985,032.56
  5. Step 5: Solve for x
    x = 74,795,985,032.56/289,293.21
  6. Step 6: Final answer
    x = 258,547.32

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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.