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Finding the Fourth Proportional to 716,380.64, 988,574.09 and 394,070.30

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Solution

The fourth proportional to 716,380.64, 988,574.09 and 394,070.30 is: 543,799.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,380.64 : 988,574.09 = 394,070.30 : x
  2. Step 2: Convert to fraction form
    716,380.64/988,574.09 = 394,070.30/x
  3. Step 3: Cross multiply
    716,380.64x = 988,574.09 × 394,070.30
  4. Step 4: Simplify right side
    716,380.64x = 389,567,684,260.83
  5. Step 5: Solve for x
    x = 389,567,684,260.83/716,380.64
  6. Step 6: Final answer
    x = 543,799.85

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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.