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Finding the Fourth Proportional to 456,428.70, 683,330.85 and 403,940.70

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Solution

The fourth proportional to 456,428.70, 683,330.85 and 403,940.70 is: 604,749.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,428.70 : 683,330.85 = 403,940.70 : x
  2. Step 2: Convert to fraction form
    456,428.70/683,330.85 = 403,940.70/x
  3. Step 3: Cross multiply
    456,428.70x = 683,330.85 × 403,940.70
  4. Step 4: Simplify right side
    456,428.70x = 276,025,141,880.60
  5. Step 5: Solve for x
    x = 276,025,141,880.60/456,428.70
  6. Step 6: Final answer
    x = 604,749.75

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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.