Home / 428,622.28-643,040.33-302,508.86

Finding the Fourth Proportional to 428,622.28, 643,040.33 and 302,508.86

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Solution

The fourth proportional to 428,622.28, 643,040.33 and 302,508.86 is: 453,838.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,622.28 : 643,040.33 = 302,508.86 : x
  2. Step 2: Convert to fraction form
    428,622.28/643,040.33 = 302,508.86/x
  3. Step 3: Cross multiply
    428,622.28x = 643,040.33 × 302,508.86
  4. Step 4: Simplify right side
    428,622.28x = 194,525,397,162.32
  5. Step 5: Solve for x
    x = 194,525,397,162.32/428,622.28
  6. Step 6: Final answer
    x = 453,838.74

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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.