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Finding the Fourth Proportional to 716,684.49, 989,024.75 and 394,394.58

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Solution

The fourth proportional to 716,684.49, 989,024.75 and 394,394.58 is: 544,264.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,684.49 : 989,024.75 = 394,394.58 : x
  2. Step 2: Convert to fraction form
    716,684.49/989,024.75 = 394,394.58/x
  3. Step 3: Cross multiply
    716,684.49x = 989,024.75 × 394,394.58
  4. Step 4: Simplify right side
    716,684.49x = 390,066,000,392.86
  5. Step 5: Solve for x
    x = 390,066,000,392.86/716,684.49
  6. Step 6: Final answer
    x = 544,264.60

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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.