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Finding the Fourth Proportional to 679,885,709.60, 1,021,340,218.80 and 654,187,584.80

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Solution

The fourth proportional to 679,885,709.60, 1,021,340,218.80 and 654,187,584.80 is: 982,735,894.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,885,709.60 : 1,021,340,218.80 = 654,187,584.80 : x
  2. Step 2: Convert to fraction form
    679,885,709.60/1,021,340,218.80 = 654,187,584.80/x
  3. Step 3: Cross multiply
    679,885,709.60x = 1,021,340,218.80 × 654,187,584.80
  4. Step 4: Simplify right side
    679,885,709.60x = 668,148,090,995,875,456
  5. Step 5: Solve for x
    x = 668,148,090,995,875,456/679,885,709.60
  6. Step 6: Final answer
    x = 982,735,894.52

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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.