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Finding the Fourth Proportional to 716,655.48, 989,008.02 and 394,388.88

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Solution

The fourth proportional to 716,655.48, 989,008.02 and 394,388.88 is: 544,269.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,655.48 : 989,008.02 = 394,388.88 : x
  2. Step 2: Convert to fraction form
    716,655.48/989,008.02 = 394,388.88/x
  3. Step 3: Cross multiply
    716,655.48x = 989,008.02 × 394,388.88
  4. Step 4: Simplify right side
    716,655.48x = 390,053,765,318.82
  5. Step 5: Solve for x
    x = 390,053,765,318.82/716,655.48
  6. Step 6: Final answer
    x = 544,269.56

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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.