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Finding the Fourth Proportional to 716,381.64, 988,575.47 and 394,071.30

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Solution

The fourth proportional to 716,381.64, 988,575.47 and 394,071.30 is: 543,801.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,381.64 : 988,575.47 = 394,071.30 : x
  2. Step 2: Convert to fraction form
    716,381.64/988,575.47 = 394,071.30/x
  3. Step 3: Cross multiply
    716,381.64x = 988,575.47 × 394,071.30
  4. Step 4: Simplify right side
    716,381.64x = 389,569,220,611.01
  5. Step 5: Solve for x
    x = 389,569,220,611.01/716,381.64
  6. Step 6: Final answer
    x = 543,801.24

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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.