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Finding the Fourth Proportional to 773,765.80, 1,159,664.55 and 689,128.90

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Solution

The fourth proportional to 773,765.80, 1,159,664.55 and 689,128.90 is: 1,032,816.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    773,765.80 : 1,159,664.55 = 689,128.90 : x
  2. Step 2: Convert to fraction form
    773,765.80/1,159,664.55 = 689,128.90/x
  3. Step 3: Cross multiply
    773,765.80x = 1,159,664.55 × 689,128.90
  4. Step 4: Simplify right side
    773,765.80x = 799,158,355,710.50
  5. Step 5: Solve for x
    x = 799,158,355,710.50/773,765.80
  6. Step 6: Final answer
    x = 1,032,816.85

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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.