Home / 830,515.40-1,245,312.30-331,315.40

Finding the Fourth Proportional to 830,515.40, 1,245,312.30 and 331,315.40

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Solution

The fourth proportional to 830,515.40, 1,245,312.30 and 331,315.40 is: 496,789.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,515.40 : 1,245,312.30 = 331,315.40 : x
  2. Step 2: Convert to fraction form
    830,515.40/1,245,312.30 = 331,315.40/x
  3. Step 3: Cross multiply
    830,515.40x = 1,245,312.30 × 331,315.40
  4. Step 4: Simplify right side
    830,515.40x = 412,591,142,799.42
  5. Step 5: Solve for x
    x = 412,591,142,799.42/830,515.40
  6. Step 6: Final answer
    x = 496,789.27

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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.