Home / 318,917.40-478,376.10-200,722.20

Finding the Fourth Proportional to 318,917.40, 478,376.10 and 200,722.20

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Solution

The fourth proportional to 318,917.40, 478,376.10 and 200,722.20 is: 301,083.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,917.40 : 478,376.10 = 200,722.20 : x
  2. Step 2: Convert to fraction form
    318,917.40/478,376.10 = 200,722.20/x
  3. Step 3: Cross multiply
    318,917.40x = 478,376.10 × 200,722.20
  4. Step 4: Simplify right side
    318,917.40x = 96,020,703,219.42
  5. Step 5: Solve for x
    x = 96,020,703,219.42/318,917.40
  6. Step 6: Final answer
    x = 301,083.30

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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.