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Finding the Fourth Proportional to 716,955.83, 989,398.76 and 394,664.25

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Solution

The fourth proportional to 716,955.83, 989,398.76 and 394,664.25 is: 544,636.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,955.83 : 989,398.76 = 394,664.25 : x
  2. Step 2: Convert to fraction form
    716,955.83/989,398.76 = 394,664.25/x
  3. Step 3: Cross multiply
    716,955.83x = 989,398.76 × 394,664.25
  4. Step 4: Simplify right side
    716,955.83x = 390,480,317,593.01
  5. Step 5: Solve for x
    x = 390,480,317,593.01/716,955.83
  6. Step 6: Final answer
    x = 544,636.51

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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.