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Finding the Fourth Proportional to 492,429.12, 679,401.12 and 301,243.20

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Solution

The fourth proportional to 492,429.12, 679,401.12 and 301,243.20 is: 415,623.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,429.12 : 679,401.12 = 301,243.20 : x
  2. Step 2: Convert to fraction form
    492,429.12/679,401.12 = 301,243.20/x
  3. Step 3: Cross multiply
    492,429.12x = 679,401.12 × 301,243.20
  4. Step 4: Simplify right side
    492,429.12x = 204,664,967,472.38
  5. Step 5: Solve for x
    x = 204,664,967,472.38/492,429.12
  6. Step 6: Final answer
    x = 415,623.20

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Double scale
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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.