Home / 685,424,585.34-1,028,284,373.67-212,714,292.78

Finding the Fourth Proportional to 685,424,585.34, 1,028,284,373.67 and 212,714,292.78

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Solution

The fourth proportional to 685,424,585.34, 1,028,284,373.67 and 212,714,292.78 is: 319,117,212.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,424,585.34 : 1,028,284,373.67 = 212,714,292.78 : x
  2. Step 2: Convert to fraction form
    685,424,585.34/1,028,284,373.67 = 212,714,292.78/x
  3. Step 3: Cross multiply
    685,424,585.34x = 1,028,284,373.67 × 212,714,292.78
  4. Step 4: Simplify right side
    685,424,585.34x = 218,730,783,321,939,296
  5. Step 5: Solve for x
    x = 218,730,783,321,939,296/685,424,585.34
  6. Step 6: Final answer
    x = 319,117,212.89

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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.