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Finding the Fourth Proportional to 716,006.88, 988,055.66 and 393,730.56

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Solution

The fourth proportional to 716,006.88, 988,055.66 and 393,730.56 is: 543,329.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,006.88 : 988,055.66 = 393,730.56 : x
  2. Step 2: Convert to fraction form
    716,006.88/988,055.66 = 393,730.56/x
  3. Step 3: Cross multiply
    716,006.88x = 988,055.66 × 393,730.56
  4. Step 4: Simplify right side
    716,006.88x = 389,027,708,322.97
  5. Step 5: Solve for x
    x = 389,027,708,322.97/716,006.88
  6. Step 6: Final answer
    x = 543,329.57

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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.