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Finding the Fourth Proportional to 520,418.58, 718,205.06 and 316,435.73

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Solution

The fourth proportional to 520,418.58, 718,205.06 and 316,435.73 is: 436,697.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,418.58 : 718,205.06 = 316,435.73 : x
  2. Step 2: Convert to fraction form
    520,418.58/718,205.06 = 316,435.73/x
  3. Step 3: Cross multiply
    520,418.58x = 718,205.06 × 316,435.73
  4. Step 4: Simplify right side
    520,418.58x = 227,265,739,650.86
  5. Step 5: Solve for x
    x = 227,265,739,650.86/520,418.58
  6. Step 6: Final answer
    x = 436,697.97

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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.