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Finding the Fourth Proportional to 547,727.45, 755,734.35 and 318,148.32

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Solution

The fourth proportional to 547,727.45, 755,734.35 and 318,148.32 is: 438,969.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,727.45 : 755,734.35 = 318,148.32 : x
  2. Step 2: Convert to fraction form
    547,727.45/755,734.35 = 318,148.32/x
  3. Step 3: Cross multiply
    547,727.45x = 755,734.35 × 318,148.32
  4. Step 4: Simplify right side
    547,727.45x = 240,435,615,161.48
  5. Step 5: Solve for x
    x = 240,435,615,161.48/547,727.45
  6. Step 6: Final answer
    x = 438,969.45

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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.