Home / 685,353,204.53-1,028,127,419.87-212,693,085.16

Finding the Fourth Proportional to 685,353,204.53, 1,028,127,419.87 and 212,693,085.16

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Solution

The fourth proportional to 685,353,204.53, 1,028,127,419.87 and 212,693,085.16 is: 319,069,921.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,353,204.53 : 1,028,127,419.87 = 212,693,085.16 : x
  2. Step 2: Convert to fraction form
    685,353,204.53/1,028,127,419.87 = 212,693,085.16/x
  3. Step 3: Cross multiply
    685,353,204.53x = 1,028,127,419.87 × 212,693,085.16
  4. Step 4: Simplify right side
    685,353,204.53x = 218,675,592,872,753,856
  5. Step 5: Solve for x
    x = 218,675,592,872,753,856/685,353,204.53
  6. Step 6: Final answer
    x = 319,069,921.07

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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.