Home / 479,756.10-661,785.87-309,990.23

Finding the Fourth Proportional to 479,756.10, 661,785.87 and 309,990.23

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Solution

The fourth proportional to 479,756.10, 661,785.87 and 309,990.23 is: 427,607.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,756.10 : 661,785.87 = 309,990.23 : x
  2. Step 2: Convert to fraction form
    479,756.10/661,785.87 = 309,990.23/x
  3. Step 3: Cross multiply
    479,756.10x = 661,785.87 × 309,990.23
  4. Step 4: Simplify right side
    479,756.10x = 205,147,154,387.28
  5. Step 5: Solve for x
    x = 205,147,154,387.28/479,756.10
  6. Step 6: Final answer
    x = 427,607.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.