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Finding the Fourth Proportional to 716,507.27, 988,795.35 and 394,218.30

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Solution

The fourth proportional to 716,507.27, 988,795.35 and 394,218.30 is: 544,029.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,507.27 : 988,795.35 = 394,218.30 : x
  2. Step 2: Convert to fraction form
    716,507.27/988,795.35 = 394,218.30/x
  3. Step 3: Cross multiply
    716,507.27x = 988,795.35 × 394,218.30
  4. Step 4: Simplify right side
    716,507.27x = 389,801,221,924.91
  5. Step 5: Solve for x
    x = 389,801,221,924.91/716,507.27
  6. Step 6: Final answer
    x = 544,029.68

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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.