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Finding the Fourth Proportional to 450,080.40, 621,380.40 and 280,544.16

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Solution

The fourth proportional to 450,080.40, 621,380.40 and 280,544.16 is: 387,318.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,080.40 : 621,380.40 = 280,544.16 : x
  2. Step 2: Convert to fraction form
    450,080.40/621,380.40 = 280,544.16/x
  3. Step 3: Cross multiply
    450,080.40x = 621,380.40 × 280,544.16
  4. Step 4: Simplify right side
    450,080.40x = 174,324,642,358.46
  5. Step 5: Solve for x
    x = 174,324,642,358.46/450,080.40
  6. Step 6: Final answer
    x = 387,318.89

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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.