Home / 645,390.40-968,085.60-329,742.40

Finding the Fourth Proportional to 645,390.40, 968,085.60 and 329,742.40

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Solution

The fourth proportional to 645,390.40, 968,085.60 and 329,742.40 is: 494,613.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,390.40 : 968,085.60 = 329,742.40 : x
  2. Step 2: Convert to fraction form
    645,390.40/968,085.60 = 329,742.40/x
  3. Step 3: Cross multiply
    645,390.40x = 968,085.60 × 329,742.40
  4. Step 4: Simplify right side
    645,390.40x = 319,218,869,149.44
  5. Step 5: Solve for x
    x = 319,218,869,149.44/645,390.40
  6. Step 6: Final answer
    x = 494,613.60

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.