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Finding the Fourth Proportional to 490,439.68, 676,806.24 and 286,630.72

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Solution

The fourth proportional to 490,439.68, 676,806.24 and 286,630.72 is: 395,550.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,439.68 : 676,806.24 = 286,630.72 : x
  2. Step 2: Convert to fraction form
    490,439.68/676,806.24 = 286,630.72/x
  3. Step 3: Cross multiply
    490,439.68x = 676,806.24 × 286,630.72
  4. Step 4: Simplify right side
    490,439.68x = 193,993,459,871.69
  5. Step 5: Solve for x
    x = 193,993,459,871.69/490,439.68
  6. Step 6: Final answer
    x = 395,550.09

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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.