Home / 920.04-1,378.44-486.24

Finding the Fourth Proportional to 920.04, 1,378.44 and 486.24

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Solution

The fourth proportional to 920.04, 1,378.44 and 486.24 is: 728.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.04 : 1,378.44 = 486.24 : x
  2. Step 2: Convert to fraction form
    920.04/1,378.44 = 486.24/x
  3. Step 3: Cross multiply
    920.04x = 1,378.44 × 486.24
  4. Step 4: Simplify right side
    920.04x = 670,252.67
  5. Step 5: Solve for x
    x = 670,252.67/920.04
  6. Step 6: Final answer
    x = 728.50

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Double scale
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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.