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Finding the Fourth Proportional to 458,912.40, 688,368.60 and 407,736.60

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Solution

The fourth proportional to 458,912.40, 688,368.60 and 407,736.60 is: 611,604.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,912.40 : 688,368.60 = 407,736.60 : x
  2. Step 2: Convert to fraction form
    458,912.40/688,368.60 = 407,736.60/x
  3. Step 3: Cross multiply
    458,912.40x = 688,368.60 × 407,736.60
  4. Step 4: Simplify right side
    458,912.40x = 280,673,072,510.76
  5. Step 5: Solve for x
    x = 280,673,072,510.76/458,912.40
  6. Step 6: Final answer
    x = 611,604.90

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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.