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Finding the Fourth Proportional to 325,855.70, 488,783.55 and 286,457.30

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Solution

The fourth proportional to 325,855.70, 488,783.55 and 286,457.30 is: 429,685.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,855.70 : 488,783.55 = 286,457.30 : x
  2. Step 2: Convert to fraction form
    325,855.70/488,783.55 = 286,457.30/x
  3. Step 3: Cross multiply
    325,855.70x = 488,783.55 × 286,457.30
  4. Step 4: Simplify right side
    325,855.70x = 140,015,616,017.42
  5. Step 5: Solve for x
    x = 140,015,616,017.42/325,855.70
  6. Step 6: Final answer
    x = 429,685.95

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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.