Home / 428,620.28-643,037.33-302,506.86

Finding the Fourth Proportional to 428,620.28, 643,037.33 and 302,506.86

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Solution

The fourth proportional to 428,620.28, 643,037.33 and 302,506.86 is: 453,835.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,620.28 : 643,037.33 = 302,506.86 : x
  2. Step 2: Convert to fraction form
    428,620.28/643,037.33 = 302,506.86/x
  3. Step 3: Cross multiply
    428,620.28x = 643,037.33 × 302,506.86
  4. Step 4: Simplify right side
    428,620.28x = 194,523,204,317.35
  5. Step 5: Solve for x
    x = 194,523,204,317.35/428,620.28
  6. Step 6: Final answer
    x = 453,835.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.