Home / 521,977.69-720,316.96-307,131.67

Finding the Fourth Proportional to 521,977.69, 720,316.96 and 307,131.67

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Solution

The fourth proportional to 521,977.69, 720,316.96 and 307,131.67 is: 423,834.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,977.69 : 720,316.96 = 307,131.67 : x
  2. Step 2: Convert to fraction form
    521,977.69/720,316.96 = 307,131.67/x
  3. Step 3: Cross multiply
    521,977.69x = 720,316.96 × 307,131.67
  4. Step 4: Simplify right side
    521,977.69x = 221,232,150,854.12
  5. Step 5: Solve for x
    x = 221,232,150,854.12/521,977.69
  6. Step 6: Final answer
    x = 423,834.50

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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.