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Finding the Fourth Proportional to 490,437.76, 676,782.52 and 286,507.56

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Solution

The fourth proportional to 490,437.76, 676,782.52 and 286,507.56 is: 395,367.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,437.76 : 676,782.52 = 286,507.56 : x
  2. Step 2: Convert to fraction form
    490,437.76/676,782.52 = 286,507.56/x
  3. Step 3: Cross multiply
    490,437.76x = 676,782.52 × 286,507.56
  4. Step 4: Simplify right side
    490,437.76x = 193,903,308,455.85
  5. Step 5: Solve for x
    x = 193,903,308,455.85/490,437.76
  6. Step 6: Final answer
    x = 395,367.82

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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.