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Finding the Fourth Proportional to 492,620.53, 679,823.89 and 288,622.64

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Solution

The fourth proportional to 492,620.53, 679,823.89 and 288,622.64 is: 398,303.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,620.53 : 679,823.89 = 288,622.64 : x
  2. Step 2: Convert to fraction form
    492,620.53/679,823.89 = 288,622.64/x
  3. Step 3: Cross multiply
    492,620.53x = 679,823.89 × 288,622.64
  4. Step 4: Simplify right side
    492,620.53x = 196,212,564,423.76
  5. Step 5: Solve for x
    x = 196,212,564,423.76/492,620.53
  6. Step 6: Final answer
    x = 398,303.67

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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.