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Finding the Fourth Proportional to 668,900.13, 1,003,503.45 and 289,884.45

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Solution

The fourth proportional to 668,900.13, 1,003,503.45 and 289,884.45 is: 434,893.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,900.13 : 1,003,503.45 = 289,884.45 : x
  2. Step 2: Convert to fraction form
    668,900.13/1,003,503.45 = 289,884.45/x
  3. Step 3: Cross multiply
    668,900.13x = 1,003,503.45 × 289,884.45
  4. Step 4: Simplify right side
    668,900.13x = 290,900,045,676.35
  5. Step 5: Solve for x
    x = 290,900,045,676.35/668,900.13
  6. Step 6: Final answer
    x = 434,893.09

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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.