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Finding the Fourth Proportional to 647,615.88, 893,715.72 and 357,238.56

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Solution

The fourth proportional to 647,615.88, 893,715.72 and 357,238.56 is: 492,992.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,615.88 : 893,715.72 = 357,238.56 : x
  2. Step 2: Convert to fraction form
    647,615.88/893,715.72 = 357,238.56/x
  3. Step 3: Cross multiply
    647,615.88x = 893,715.72 × 357,238.56
  4. Step 4: Simplify right side
    647,615.88x = 319,269,716,862.16
  5. Step 5: Solve for x
    x = 319,269,716,862.16/647,615.88
  6. Step 6: Final answer
    x = 492,992.42

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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.