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Finding the Fourth Proportional to 647,128.07, 893,039.55 and 356,733.42

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Solution

The fourth proportional to 647,128.07, 893,039.55 and 356,733.42 is: 492,293.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,128.07 : 893,039.55 = 356,733.42 : x
  2. Step 2: Convert to fraction form
    647,128.07/893,039.55 = 356,733.42/x
  3. Step 3: Cross multiply
    647,128.07x = 893,039.55 × 356,733.42
  4. Step 4: Simplify right side
    647,128.07x = 318,577,048,180.11
  5. Step 5: Solve for x
    x = 318,577,048,180.11/647,128.07
  6. Step 6: Final answer
    x = 492,293.66

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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.