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Finding the Fourth Proportional to 716,858.42, 989,256.78 and 394,561.58

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Solution

The fourth proportional to 716,858.42, 989,256.78 and 394,561.58 is: 544,490.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,858.42 : 989,256.78 = 394,561.58 : x
  2. Step 2: Convert to fraction form
    716,858.42/989,256.78 = 394,561.58/x
  3. Step 3: Cross multiply
    716,858.42x = 989,256.78 × 394,561.58
  4. Step 4: Simplify right side
    716,858.42x = 390,322,713,196.23
  5. Step 5: Solve for x
    x = 390,322,713,196.23/716,858.42
  6. Step 6: Final answer
    x = 544,490.66

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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.