Home / 427,965.20-641,947.80-260,003.60

Finding the Fourth Proportional to 427,965.20, 641,947.80 and 260,003.60

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Solution

The fourth proportional to 427,965.20, 641,947.80 and 260,003.60 is: 390,005.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,965.20 : 641,947.80 = 260,003.60 : x
  2. Step 2: Convert to fraction form
    427,965.20/641,947.80 = 260,003.60/x
  3. Step 3: Cross multiply
    427,965.20x = 641,947.80 × 260,003.60
  4. Step 4: Simplify right side
    427,965.20x = 166,908,739,012.08
  5. Step 5: Solve for x
    x = 166,908,739,012.08/427,965.20
  6. Step 6: Final answer
    x = 390,005.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.