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Finding the Fourth Proportional to 679,885,745.60, 1,021,340,272.80 and 654,187,620.80

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Solution

The fourth proportional to 679,885,745.60, 1,021,340,272.80 and 654,187,620.80 is: 982,735,948.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,885,745.60 : 1,021,340,272.80 = 654,187,620.80 : x
  2. Step 2: Convert to fraction form
    679,885,745.60/1,021,340,272.80 = 654,187,620.80/x
  3. Step 3: Cross multiply
    679,885,745.60x = 1,021,340,272.80 × 654,187,620.80
  4. Step 4: Simplify right side
    679,885,745.60x = 668,148,163,090,254,848
  5. Step 5: Solve for x
    x = 668,148,163,090,254,848/679,885,745.60
  6. Step 6: Final answer
    x = 982,735,948.52

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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.