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Finding the Fourth Proportional to 867,136.40, 1,300,704.60 and 368,435.60

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Solution

The fourth proportional to 867,136.40, 1,300,704.60 and 368,435.60 is: 552,653.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,136.40 : 1,300,704.60 = 368,435.60 : x
  2. Step 2: Convert to fraction form
    867,136.40/1,300,704.60 = 368,435.60/x
  3. Step 3: Cross multiply
    867,136.40x = 1,300,704.60 × 368,435.60
  4. Step 4: Simplify right side
    867,136.40x = 479,225,879,723.76
  5. Step 5: Solve for x
    x = 479,225,879,723.76/867,136.40
  6. Step 6: Final answer
    x = 552,653.40

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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.