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Finding the Fourth Proportional to 628,439.94, 942,807.53 and 207,715.82

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Solution

The fourth proportional to 628,439.94, 942,807.53 and 207,715.82 is: 311,622.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,439.94 : 942,807.53 = 207,715.82 : x
  2. Step 2: Convert to fraction form
    628,439.94/942,807.53 = 207,715.82/x
  3. Step 3: Cross multiply
    628,439.94x = 942,807.53 × 207,715.82
  4. Step 4: Simplify right side
    628,439.94x = 195,836,035,001.38
  5. Step 5: Solve for x
    x = 195,836,035,001.38/628,439.94
  6. Step 6: Final answer
    x = 311,622.52

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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.