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Finding the Fourth Proportional to 486,379.68, 670,674.96 and 316,298.40

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Solution

The fourth proportional to 486,379.68, 670,674.96 and 316,298.40 is: 436,147.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,379.68 : 670,674.96 = 316,298.40 : x
  2. Step 2: Convert to fraction form
    486,379.68/670,674.96 = 316,298.40/x
  3. Step 3: Cross multiply
    486,379.68x = 670,674.96 × 316,298.40
  4. Step 4: Simplify right side
    486,379.68x = 212,133,416,768.06
  5. Step 5: Solve for x
    x = 212,133,416,768.06/486,379.68
  6. Step 6: Final answer
    x = 436,147.78

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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.