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Finding the Fourth Proportional to 716,300.82, 988,458.39 and 394,002.63

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Solution

The fourth proportional to 716,300.82, 988,458.39 and 394,002.63 is: 543,703.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,300.82 : 988,458.39 = 394,002.63 : x
  2. Step 2: Convert to fraction form
    716,300.82/988,458.39 = 394,002.63/x
  3. Step 3: Cross multiply
    716,300.82x = 988,458.39 × 394,002.63
  4. Step 4: Simplify right side
    716,300.82x = 389,455,205,305.57
  5. Step 5: Solve for x
    x = 389,455,205,305.57/716,300.82
  6. Step 6: Final answer
    x = 543,703.42

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Double scale
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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.