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Finding the Fourth Proportional to 219,290.88, 302,588.84 and 128,612.64

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Solution

The fourth proportional to 219,290.88, 302,588.84 and 128,612.64 is: 177,466.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,290.88 : 302,588.84 = 128,612.64 : x
  2. Step 2: Convert to fraction form
    219,290.88/302,588.84 = 128,612.64/x
  3. Step 3: Cross multiply
    219,290.88x = 302,588.84 × 128,612.64
  4. Step 4: Simplify right side
    219,290.88x = 38,916,749,546.94
  5. Step 5: Solve for x
    x = 38,916,749,546.94/219,290.88
  6. Step 6: Final answer
    x = 177,466.34

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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.