Home / 684,861.05-945,136.08-378,932.45

Finding the Fourth Proportional to 684,861.05, 945,136.08 and 378,932.45

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Solution

The fourth proportional to 684,861.05, 945,136.08 and 378,932.45 is: 522,942.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,861.05 : 945,136.08 = 378,932.45 : x
  2. Step 2: Convert to fraction form
    684,861.05/945,136.08 = 378,932.45/x
  3. Step 3: Cross multiply
    684,861.05x = 945,136.08 × 378,932.45
  4. Step 4: Simplify right side
    684,861.05x = 358,142,725,652.12
  5. Step 5: Solve for x
    x = 358,142,725,652.12/684,861.05
  6. Step 6: Final answer
    x = 522,942.18

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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.