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Finding the Fourth Proportional to 643,059.05, 887,378.24 and 356,568.53

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Solution

The fourth proportional to 643,059.05, 887,378.24 and 356,568.53 is: 492,040.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,059.05 : 887,378.24 = 356,568.53 : x
  2. Step 2: Convert to fraction form
    643,059.05/887,378.24 = 356,568.53/x
  3. Step 3: Cross multiply
    643,059.05x = 887,378.24 × 356,568.53
  4. Step 4: Simplify right side
    643,059.05x = 316,411,152,807.95
  5. Step 5: Solve for x
    x = 316,411,152,807.95/643,059.05
  6. Step 6: Final answer
    x = 492,040.59

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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.