Home / 679,021,118.78-1,017,806,520.80-387,260,009.78

Finding the Fourth Proportional to 679,021,118.78, 1,017,806,520.80 and 387,260,009.78

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Solution

The fourth proportional to 679,021,118.78, 1,017,806,520.80 and 387,260,009.78 is: 580,476,442.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,021,118.78 : 1,017,806,520.80 = 387,260,009.78 : x
  2. Step 2: Convert to fraction form
    679,021,118.78/1,017,806,520.80 = 387,260,009.78/x
  3. Step 3: Cross multiply
    679,021,118.78x = 1,017,806,520.80 × 387,260,009.78
  4. Step 4: Simplify right side
    679,021,118.78x = 394,155,763,199,155,712
  5. Step 5: Solve for x
    x = 394,155,763,199,155,712/679,021,118.78
  6. Step 6: Final answer
    x = 580,476,442.19

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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.