Home / 811,279.28-1,216,921.04-331,507.12

Finding the Fourth Proportional to 811,279.28, 1,216,921.04 and 331,507.12

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Solution

The fourth proportional to 811,279.28, 1,216,921.04 and 331,507.12 is: 497,261.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,279.28 : 1,216,921.04 = 331,507.12 : x
  2. Step 2: Convert to fraction form
    811,279.28/1,216,921.04 = 331,507.12/x
  3. Step 3: Cross multiply
    811,279.28x = 1,216,921.04 × 331,507.12
  4. Step 4: Simplify right side
    811,279.28x = 403,417,989,237.81
  5. Step 5: Solve for x
    x = 403,417,989,237.81/811,279.28
  6. Step 6: Final answer
    x = 497,261.55

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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.