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Finding the Fourth Proportional to 389,437.45, 545,999.75 and 389,437.45

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Solution

The fourth proportional to 389,437.45, 545,999.75 and 389,437.45 is: 545,999.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,437.45 : 545,999.75 = 389,437.45 : x
  2. Step 2: Convert to fraction form
    389,437.45/545,999.75 = 389,437.45/x
  3. Step 3: Cross multiply
    389,437.45x = 545,999.75 × 389,437.45
  4. Step 4: Simplify right side
    389,437.45x = 212,632,750,340.64
  5. Step 5: Solve for x
    x = 212,632,750,340.64/389,437.45
  6. Step 6: Final answer
    x = 545,999.75

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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.