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Finding the Fourth Proportional to 800,803.72, 1,104,999.84 and 478,445.32

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Solution

The fourth proportional to 800,803.72, 1,104,999.84 and 478,445.32 is: 660,189.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,803.72 : 1,104,999.84 = 478,445.32 : x
  2. Step 2: Convert to fraction form
    800,803.72/1,104,999.84 = 478,445.32/x
  3. Step 3: Cross multiply
    800,803.72x = 1,104,999.84 × 478,445.32
  4. Step 4: Simplify right side
    800,803.72x = 528,682,002,048.75
  5. Step 5: Solve for x
    x = 528,682,002,048.75/800,803.72
  6. Step 6: Final answer
    x = 660,189.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.