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Finding the Fourth Proportional to 356,633.45, 491,867.18 and 313,520.76

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Solution

The fourth proportional to 356,633.45, 491,867.18 and 313,520.76 is: 432,406.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,633.45 : 491,867.18 = 313,520.76 : x
  2. Step 2: Convert to fraction form
    356,633.45/491,867.18 = 313,520.76/x
  3. Step 3: Cross multiply
    356,633.45x = 491,867.18 × 313,520.76
  4. Step 4: Simplify right side
    356,633.45x = 154,210,570,525.05
  5. Step 5: Solve for x
    x = 154,210,570,525.05/356,633.45
  6. Step 6: Final answer
    x = 432,406.36

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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.