Home / 791,805.40-1,187,999.70-318,830.20

Finding the Fourth Proportional to 791,805.40, 1,187,999.70 and 318,830.20

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Solution

The fourth proportional to 791,805.40, 1,187,999.70 and 318,830.20 is: 478,362.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    791,805.40 : 1,187,999.70 = 318,830.20 : x
  2. Step 2: Convert to fraction form
    791,805.40/1,187,999.70 = 318,830.20/x
  3. Step 3: Cross multiply
    791,805.40x = 1,187,999.70 × 318,830.20
  4. Step 4: Simplify right side
    791,805.40x = 378,770,181,950.94
  5. Step 5: Solve for x
    x = 378,770,181,950.94/791,805.40
  6. Step 6: Final answer
    x = 478,362.72

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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.