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Finding the Fourth Proportional to 908,779.80, 1,363,169.70 and 310,416.60

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Solution

The fourth proportional to 908,779.80, 1,363,169.70 and 310,416.60 is: 465,624.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,779.80 : 1,363,169.70 = 310,416.60 : x
  2. Step 2: Convert to fraction form
    908,779.80/1,363,169.70 = 310,416.60/x
  3. Step 3: Cross multiply
    908,779.80x = 1,363,169.70 × 310,416.60
  4. Step 4: Simplify right side
    908,779.80x = 423,150,503,497.02
  5. Step 5: Solve for x
    x = 423,150,503,497.02/908,779.80
  6. Step 6: Final answer
    x = 465,624.90

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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.