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Finding the Fourth Proportional to 300,939.66, 415,339.35 and 186,255.21

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Solution

The fourth proportional to 300,939.66, 415,339.35 and 186,255.21 is: 257,058.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,939.66 : 415,339.35 = 186,255.21 : x
  2. Step 2: Convert to fraction form
    300,939.66/415,339.35 = 186,255.21/x
  3. Step 3: Cross multiply
    300,939.66x = 415,339.35 × 186,255.21
  4. Step 4: Simplify right side
    300,939.66x = 77,359,117,855.51
  5. Step 5: Solve for x
    x = 77,359,117,855.51/300,939.66
  6. Step 6: Final answer
    x = 257,058.57

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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.