Home / 645,516.54-890,840.43-373,596.30

Finding the Fourth Proportional to 645,516.54, 890,840.43 and 373,596.30

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Solution

The fourth proportional to 645,516.54, 890,840.43 and 373,596.30 is: 515,578.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,516.54 : 890,840.43 = 373,596.30 : x
  2. Step 2: Convert to fraction form
    645,516.54/890,840.43 = 373,596.30/x
  3. Step 3: Cross multiply
    645,516.54x = 890,840.43 × 373,596.30
  4. Step 4: Simplify right side
    645,516.54x = 332,814,688,538.41
  5. Step 5: Solve for x
    x = 332,814,688,538.41/645,516.54
  6. Step 6: Final answer
    x = 515,578.87

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Double scale
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Similar ratio
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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.