Home / 880,004.20-1,320,006.30-318,965.80

Finding the Fourth Proportional to 880,004.20, 1,320,006.30 and 318,965.80

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Solution

The fourth proportional to 880,004.20, 1,320,006.30 and 318,965.80 is: 478,448.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,004.20 : 1,320,006.30 = 318,965.80 : x
  2. Step 2: Convert to fraction form
    880,004.20/1,320,006.30 = 318,965.80/x
  3. Step 3: Cross multiply
    880,004.20x = 1,320,006.30 × 318,965.80
  4. Step 4: Simplify right side
    880,004.20x = 421,036,865,484.54
  5. Step 5: Solve for x
    x = 421,036,865,484.54/880,004.20
  6. Step 6: Final answer
    x = 478,448.70

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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.