Home / 811,520.40-1,217,280.60-306,003.60

Finding the Fourth Proportional to 811,520.40, 1,217,280.60 and 306,003.60

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Solution

The fourth proportional to 811,520.40, 1,217,280.60 and 306,003.60 is: 459,005.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,520.40 : 1,217,280.60 = 306,003.60 : x
  2. Step 2: Convert to fraction form
    811,520.40/1,217,280.60 = 306,003.60/x
  3. Step 3: Cross multiply
    811,520.40x = 1,217,280.60 × 306,003.60
  4. Step 4: Simplify right side
    811,520.40x = 372,492,245,810.16
  5. Step 5: Solve for x
    x = 372,492,245,810.16/811,520.40
  6. Step 6: Final answer
    x = 459,005.40

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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.