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Finding the Fourth Proportional to 716,874.15, 989,278.50 and 394,577.31

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Solution

The fourth proportional to 716,874.15, 989,278.50 and 394,577.31 is: 544,512.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,874.15 : 989,278.50 = 394,577.31 : x
  2. Step 2: Convert to fraction form
    716,874.15/989,278.50 = 394,577.31/x
  3. Step 3: Cross multiply
    716,874.15x = 989,278.50 × 394,577.31
  4. Step 4: Simplify right side
    716,874.15x = 390,346,849,370.84
  5. Step 5: Solve for x
    x = 390,346,849,370.84/716,874.15
  6. Step 6: Final answer
    x = 544,512.38

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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.