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Finding the Fourth Proportional to 587,206.38, 810,340.35 and 318,936.30

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Solution

The fourth proportional to 587,206.38, 810,340.35 and 318,936.30 is: 440,129.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,206.38 : 810,340.35 = 318,936.30 : x
  2. Step 2: Convert to fraction form
    587,206.38/810,340.35 = 318,936.30/x
  3. Step 3: Cross multiply
    587,206.38x = 810,340.35 × 318,936.30
  4. Step 4: Simplify right side
    587,206.38x = 258,446,952,969.71
  5. Step 5: Solve for x
    x = 258,446,952,969.71/587,206.38
  6. Step 6: Final answer
    x = 440,129.67

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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.