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Finding the Fourth Proportional to 666,863.18, 920,271.11 and 360,939.50

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Solution

The fourth proportional to 666,863.18, 920,271.11 and 360,939.50 is: 498,096.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,863.18 : 920,271.11 = 360,939.50 : x
  2. Step 2: Convert to fraction form
    666,863.18/920,271.11 = 360,939.50/x
  3. Step 3: Cross multiply
    666,863.18x = 920,271.11 × 360,939.50
  4. Step 4: Simplify right side
    666,863.18x = 332,162,194,307.85
  5. Step 5: Solve for x
    x = 332,162,194,307.85/666,863.18
  6. Step 6: Final answer
    x = 498,096.47

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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.