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Finding the Fourth Proportional to 763,408.80, 1,053,405 and 423,811.44

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Solution

The fourth proportional to 763,408.80, 1,053,405 and 423,811.44 is: 584,804.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,408.80 : 1,053,405 = 423,811.44 : x
  2. Step 2: Convert to fraction form
    763,408.80/1,053,405 = 423,811.44/x
  3. Step 3: Cross multiply
    763,408.80x = 1,053,405 × 423,811.44
  4. Step 4: Simplify right side
    763,408.80x = 446,445,089,953.20
  5. Step 5: Solve for x
    x = 446,445,089,953.20/763,408.80
  6. Step 6: Final answer
    x = 584,804.75

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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.