Home / 428,634.15-643,058.16-302,520.76

Finding the Fourth Proportional to 428,634.15, 643,058.16 and 302,520.76

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Solution

The fourth proportional to 428,634.15, 643,058.16 and 302,520.76 is: 453,856.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,634.15 : 643,058.16 = 302,520.76 : x
  2. Step 2: Convert to fraction form
    428,634.15/643,058.16 = 302,520.76/x
  3. Step 3: Cross multiply
    428,634.15x = 643,058.16 × 302,520.76
  4. Step 4: Simplify right side
    428,634.15x = 194,538,440,545.30
  5. Step 5: Solve for x
    x = 194,538,440,545.30/428,634.15
  6. Step 6: Final answer
    x = 453,856.61

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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.