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Finding the Fourth Proportional to 325,329.42, 485,779.67 and 287,059.76

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Solution

The fourth proportional to 325,329.42, 485,779.67 and 287,059.76 is: 428,635.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,329.42 : 485,779.67 = 287,059.76 : x
  2. Step 2: Convert to fraction form
    325,329.42/485,779.67 = 287,059.76/x
  3. Step 3: Cross multiply
    325,329.42x = 485,779.67 × 287,059.76
  4. Step 4: Simplify right side
    325,329.42x = 139,447,795,483.08
  5. Step 5: Solve for x
    x = 139,447,795,483.08/325,329.42
  6. Step 6: Final answer
    x = 428,635.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.