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Finding the Fourth Proportional to 890,666.10, 1,339,109.55 and 872,003.70

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Solution

The fourth proportional to 890,666.10, 1,339,109.55 and 872,003.70 is: 1,311,050.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,666.10 : 1,339,109.55 = 872,003.70 : x
  2. Step 2: Convert to fraction form
    890,666.10/1,339,109.55 = 872,003.70/x
  3. Step 3: Cross multiply
    890,666.10x = 1,339,109.55 × 872,003.70
  4. Step 4: Simplify right side
    890,666.10x = 1,167,708,482,305.34
  5. Step 5: Solve for x
    x = 1,167,708,482,305.34/890,666.10
  6. Step 6: Final answer
    x = 1,311,050.78

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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.