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Finding the Fourth Proportional to 520,297.94, 718,126.89 and 316,305.61

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Solution

The fourth proportional to 520,297.94, 718,126.89 and 316,305.61 is: 436,572.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,297.94 : 718,126.89 = 316,305.61 : x
  2. Step 2: Convert to fraction form
    520,297.94/718,126.89 = 316,305.61/x
  3. Step 3: Cross multiply
    520,297.94x = 718,126.89 × 316,305.61
  4. Step 4: Simplify right side
    520,297.94x = 227,147,563,998.85
  5. Step 5: Solve for x
    x = 227,147,563,998.85/520,297.94
  6. Step 6: Final answer
    x = 436,572.10

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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.