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Finding the Fourth Proportional to 309,903.70, 464,855.55 and 209,520.40

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Solution

The fourth proportional to 309,903.70, 464,855.55 and 209,520.40 is: 314,280.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,903.70 : 464,855.55 = 209,520.40 : x
  2. Step 2: Convert to fraction form
    309,903.70/464,855.55 = 209,520.40/x
  3. Step 3: Cross multiply
    309,903.70x = 464,855.55 × 209,520.40
  4. Step 4: Simplify right side
    309,903.70x = 97,396,720,778.22
  5. Step 5: Solve for x
    x = 97,396,720,778.22/309,903.70
  6. Step 6: Final answer
    x = 314,280.60

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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.