Home / 769,279.40-1,154,132.40-320,211.80

Finding the Fourth Proportional to 769,279.40, 1,154,132.40 and 320,211.80

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Solution

The fourth proportional to 769,279.40, 1,154,132.40 and 320,211.80 is: 480,406.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,279.40 : 1,154,132.40 = 320,211.80 : x
  2. Step 2: Convert to fraction form
    769,279.40/1,154,132.40 = 320,211.80/x
  3. Step 3: Cross multiply
    769,279.40x = 1,154,132.40 × 320,211.80
  4. Step 4: Simplify right side
    769,279.40x = 369,566,813,242.32
  5. Step 5: Solve for x
    x = 369,566,813,242.32/769,279.40
  6. Step 6: Final answer
    x = 480,406.49

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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.