Home / 421,462,071.27-631,937,107-211,128,144.70

Finding the Fourth Proportional to 421,462,071.27, 631,937,107 and 211,128,144.70

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Solution

The fourth proportional to 421,462,071.27, 631,937,107 and 211,128,144.70 is: 316,563,975.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,462,071.27 : 631,937,107 = 211,128,144.70 : x
  2. Step 2: Convert to fraction form
    421,462,071.27/631,937,107 = 211,128,144.70/x
  3. Step 3: Cross multiply
    421,462,071.27x = 631,937,107 × 211,128,144.70
  4. Step 4: Simplify right side
    421,462,071.27x = 133,419,708,964,835,696
  5. Step 5: Solve for x
    x = 133,419,708,964,835,696/421,462,071.27
  6. Step 6: Final answer
    x = 316,563,975.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.