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Finding the Fourth Proportional to 219,295.94, 302,630.90 and 128,653.47

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Solution

The fourth proportional to 219,295.94, 302,630.90 and 128,653.47 is: 177,543.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,295.94 : 302,630.90 = 128,653.47 : x
  2. Step 2: Convert to fraction form
    219,295.94/302,630.90 = 128,653.47/x
  3. Step 3: Cross multiply
    219,295.94x = 302,630.90 × 128,653.47
  4. Step 4: Simplify right side
    219,295.94x = 38,934,514,770.96
  5. Step 5: Solve for x
    x = 38,934,514,770.96/219,295.94
  6. Step 6: Final answer
    x = 177,543.26

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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.