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Finding the Fourth Proportional to 421,791,636.72, 582,065,957.16 and 236,159,295.42

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Solution

The fourth proportional to 421,791,636.72, 582,065,957.16 and 236,159,295.42 is: 325,896,187.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,791,636.72 : 582,065,957.16 = 236,159,295.42 : x
  2. Step 2: Convert to fraction form
    421,791,636.72/582,065,957.16 = 236,159,295.42/x
  3. Step 3: Cross multiply
    421,791,636.72x = 582,065,957.16 × 236,159,295.42
  4. Step 4: Simplify right side
    421,791,636.72x = 137,460,286,330,873,488
  5. Step 5: Solve for x
    x = 137,460,286,330,873,488/421,791,636.72
  6. Step 6: Final answer
    x = 325,896,187.51

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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.