Home / 543,377.20-815,065.80-318,845.20

Finding the Fourth Proportional to 543,377.20, 815,065.80 and 318,845.20

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Solution

The fourth proportional to 543,377.20, 815,065.80 and 318,845.20 is: 478,267.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,377.20 : 815,065.80 = 318,845.20 : x
  2. Step 2: Convert to fraction form
    543,377.20/815,065.80 = 318,845.20/x
  3. Step 3: Cross multiply
    543,377.20x = 815,065.80 × 318,845.20
  4. Step 4: Simplify right side
    543,377.20x = 259,879,818,014.16
  5. Step 5: Solve for x
    x = 259,879,818,014.16/543,377.20
  6. Step 6: Final answer
    x = 478,267.80

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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.