Home / 684,868.96-945,120.72-378,967.60

Finding the Fourth Proportional to 684,868.96, 945,120.72 and 378,967.60

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Solution

The fourth proportional to 684,868.96, 945,120.72 and 378,967.60 is: 522,976.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,868.96 : 945,120.72 = 378,967.60 : x
  2. Step 2: Convert to fraction form
    684,868.96/945,120.72 = 378,967.60/x
  3. Step 3: Cross multiply
    684,868.96x = 945,120.72 × 378,967.60
  4. Step 4: Simplify right side
    684,868.96x = 358,170,130,968.67
  5. Step 5: Solve for x
    x = 358,170,130,968.67/684,868.96
  6. Step 6: Final answer
    x = 522,976.15

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.