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Finding the Fourth Proportional to 716,512.89, 988,803.12 and 394,223.93

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Solution

The fourth proportional to 716,512.89, 988,803.12 and 394,223.93 is: 544,037.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,512.89 : 988,803.12 = 394,223.93 : x
  2. Step 2: Convert to fraction form
    716,512.89/988,803.12 = 394,223.93/x
  3. Step 3: Cross multiply
    716,512.89x = 988,803.12 × 394,223.93
  4. Step 4: Simplify right side
    716,512.89x = 389,809,851,962.66
  5. Step 5: Solve for x
    x = 389,809,851,962.66/716,512.89
  6. Step 6: Final answer
    x = 544,037.46

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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.