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Finding the Fourth Proportional to 490,435.76, 676,779.76 and 286,505.56

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Solution

The fourth proportional to 490,435.76, 676,779.76 and 286,505.56 is: 395,365.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,435.76 : 676,779.76 = 286,505.56 : x
  2. Step 2: Convert to fraction form
    490,435.76/676,779.76 = 286,505.56/x
  3. Step 3: Cross multiply
    490,435.76x = 676,779.76 × 286,505.56
  4. Step 4: Simplify right side
    490,435.76x = 193,901,164,135.47
  5. Step 5: Solve for x
    x = 193,901,164,135.47/490,435.76
  6. Step 6: Final answer
    x = 395,365.06

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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.