Home / 667,617,289.77-921,190,040.51-385,256,721.36

Finding the Fourth Proportional to 667,617,289.77, 921,190,040.51 and 385,256,721.36

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Solution

The fourth proportional to 667,617,289.77, 921,190,040.51 and 385,256,721.36 is: 531,583,978.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,617,289.77 : 921,190,040.51 = 385,256,721.36 : x
  2. Step 2: Convert to fraction form
    667,617,289.77/921,190,040.51 = 385,256,721.36/x
  3. Step 3: Cross multiply
    667,617,289.77x = 921,190,040.51 × 385,256,721.36
  4. Step 4: Simplify right side
    667,617,289.77x = 354,894,654,754,441,920
  5. Step 5: Solve for x
    x = 354,894,654,754,441,920/667,617,289.77
  6. Step 6: Final answer
    x = 531,583,978.12

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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.