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Finding the Fourth Proportional to 492,511.79, 679,636.98 and 285,764.22

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Solution

The fourth proportional to 492,511.79, 679,636.98 and 285,764.22 is: 394,337.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,511.79 : 679,636.98 = 285,764.22 : x
  2. Step 2: Convert to fraction form
    492,511.79/679,636.98 = 285,764.22/x
  3. Step 3: Cross multiply
    492,511.79x = 679,636.98 × 285,764.22
  4. Step 4: Simplify right side
    492,511.79x = 194,215,931,472.86
  5. Step 5: Solve for x
    x = 194,215,931,472.86/492,511.79
  6. Step 6: Final answer
    x = 394,337.63

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1.5x scale

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.