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Finding the Fourth Proportional to 389,307.92, 537,228.60 and 219,557.84

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Solution

The fourth proportional to 389,307.92, 537,228.60 and 219,557.84 is: 302,980.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,307.92 : 537,228.60 = 219,557.84 : x
  2. Step 2: Convert to fraction form
    389,307.92/537,228.60 = 219,557.84/x
  3. Step 3: Cross multiply
    389,307.92x = 537,228.60 × 219,557.84
  4. Step 4: Simplify right side
    389,307.92x = 117,952,751,002.22
  5. Step 5: Solve for x
    x = 117,952,751,002.22/389,307.92
  6. Step 6: Final answer
    x = 302,980.61

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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.