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Finding the Fourth Proportional to 716,513.40, 988,803.81 and 394,224.44

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Solution

The fourth proportional to 716,513.40, 988,803.81 and 394,224.44 is: 544,038.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,513.40 : 988,803.81 = 394,224.44 : x
  2. Step 2: Convert to fraction form
    716,513.40/988,803.81 = 394,224.44/x
  3. Step 3: Cross multiply
    716,513.40x = 988,803.81 × 394,224.44
  4. Step 4: Simplify right side
    716,513.40x = 389,810,623,323.10
  5. Step 5: Solve for x
    x = 389,810,623,323.10/716,513.40
  6. Step 6: Final answer
    x = 544,038.15

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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.