Home / 839,420.80-1,259,438.40-340,835.20

Finding the Fourth Proportional to 839,420.80, 1,259,438.40 and 340,835.20

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Solution

The fourth proportional to 839,420.80, 1,259,438.40 and 340,835.20 is: 511,377.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,420.80 : 1,259,438.40 = 340,835.20 : x
  2. Step 2: Convert to fraction form
    839,420.80/1,259,438.40 = 340,835.20/x
  3. Step 3: Cross multiply
    839,420.80x = 1,259,438.40 × 340,835.20
  4. Step 4: Simplify right side
    839,420.80x = 429,260,938,951.68
  5. Step 5: Solve for x
    x = 429,260,938,951.68/839,420.80
  6. Step 6: Final answer
    x = 511,377.53

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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.