Home / 990,999.66-1,486,720.99-317,121.42

Finding the Fourth Proportional to 990,999.66, 1,486,720.99 and 317,121.42

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Solution

The fourth proportional to 990,999.66, 1,486,720.99 and 317,121.42 is: 475,753.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,999.66 : 1,486,720.99 = 317,121.42 : x
  2. Step 2: Convert to fraction form
    990,999.66/1,486,720.99 = 317,121.42/x
  3. Step 3: Cross multiply
    990,999.66x = 1,486,720.99 × 317,121.42
  4. Step 4: Simplify right side
    990,999.66x = 471,471,071,492.61
  5. Step 5: Solve for x
    x = 471,471,071,492.61/990,999.66
  6. Step 6: Final answer
    x = 475,753.01

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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.