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Finding the Fourth Proportional to 438,884,004.20, 613,631,390.20 and 438,884,004.20

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Solution

The fourth proportional to 438,884,004.20, 613,631,390.20 and 438,884,004.20 is: 613,631,390.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,884,004.20 : 613,631,390.20 = 438,884,004.20 : x
  2. Step 2: Convert to fraction form
    438,884,004.20/613,631,390.20 = 438,884,004.20/x
  3. Step 3: Cross multiply
    438,884,004.20x = 613,631,390.20 × 438,884,004.20
  4. Step 4: Simplify right side
    438,884,004.20x = 269,313,001,633,788,640
  5. Step 5: Solve for x
    x = 269,313,001,633,788,640/438,884,004.20
  6. Step 6: Final answer
    x = 613,631,390.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.