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Finding the Fourth Proportional to 716,455.21, 988,708.16 and 394,158.39

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Solution

The fourth proportional to 716,455.21, 988,708.16 and 394,158.39 is: 543,938.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,455.21 : 988,708.16 = 394,158.39 : x
  2. Step 2: Convert to fraction form
    716,455.21/988,708.16 = 394,158.39/x
  3. Step 3: Cross multiply
    716,455.21x = 988,708.16 × 394,158.39
  4. Step 4: Simplify right side
    716,455.21x = 389,707,616,525.46
  5. Step 5: Solve for x
    x = 389,707,616,525.46/716,455.21
  6. Step 6: Final answer
    x = 543,938.56

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1.5x scale

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.