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Finding the Fourth Proportional to 219,295.24, 302,630 and 128,652.78

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Solution

The fourth proportional to 219,295.24, 302,630 and 128,652.78 is: 177,542.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,295.24 : 302,630 = 128,652.78 : x
  2. Step 2: Convert to fraction form
    219,295.24/302,630 = 128,652.78/x
  3. Step 3: Cross multiply
    219,295.24x = 302,630 × 128,652.78
  4. Step 4: Simplify right side
    219,295.24x = 38,934,190,811.40
  5. Step 5: Solve for x
    x = 38,934,190,811.40/219,295.24
  6. Step 6: Final answer
    x = 177,542.34

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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.