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Finding the Fourth Proportional to 389,432.45, 545,992.75 and 389,432.45

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Solution

The fourth proportional to 389,432.45, 545,992.75 and 389,432.45 is: 545,992.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,432.45 : 545,992.75 = 389,432.45 : x
  2. Step 2: Convert to fraction form
    389,432.45/545,992.75 = 389,432.45/x
  3. Step 3: Cross multiply
    389,432.45x = 545,992.75 × 389,432.45
  4. Step 4: Simplify right side
    389,432.45x = 212,627,294,314.74
  5. Step 5: Solve for x
    x = 212,627,294,314.74/389,432.45
  6. Step 6: Final answer
    x = 545,992.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.