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Finding the Fourth Proportional to 908,683.80, 1,363,025.70 and 310,320.60

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Solution

The fourth proportional to 908,683.80, 1,363,025.70 and 310,320.60 is: 465,480.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,683.80 : 1,363,025.70 = 310,320.60 : x
  2. Step 2: Convert to fraction form
    908,683.80/1,363,025.70 = 310,320.60/x
  3. Step 3: Cross multiply
    908,683.80x = 1,363,025.70 × 310,320.60
  4. Step 4: Simplify right side
    908,683.80x = 422,974,953,039.42
  5. Step 5: Solve for x
    x = 422,974,953,039.42/908,683.80
  6. Step 6: Final answer
    x = 465,480.90

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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.