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Finding the Fourth Proportional to 219,370.98, 302,733.96 and 128,728.46

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Solution

The fourth proportional to 219,370.98, 302,733.96 and 128,728.46 is: 177,646.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,370.98 : 302,733.96 = 128,728.46 : x
  2. Step 2: Convert to fraction form
    219,370.98/302,733.96 = 128,728.46/x
  3. Step 3: Cross multiply
    219,370.98x = 302,733.96 × 128,728.46
  4. Step 4: Simplify right side
    219,370.98x = 38,970,476,460.50
  5. Step 5: Solve for x
    x = 38,970,476,460.50/219,370.98
  6. Step 6: Final answer
    x = 177,646.45

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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.