Home / 490,439.76-676,785.28-286,509.56

Finding the Fourth Proportional to 490,439.76, 676,785.28 and 286,509.56

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Solution

The fourth proportional to 490,439.76, 676,785.28 and 286,509.56 is: 395,370.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,439.76 : 676,785.28 = 286,509.56 : x
  2. Step 2: Convert to fraction form
    490,439.76/676,785.28 = 286,509.56/x
  3. Step 3: Cross multiply
    490,439.76x = 676,785.28 × 286,509.56
  4. Step 4: Simplify right side
    490,439.76x = 193,905,452,787.28
  5. Step 5: Solve for x
    x = 193,905,452,787.28/490,439.76
  6. Step 6: Final answer
    x = 395,370.58

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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.