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Finding the Fourth Proportional to 716,967.72, 989,432.82 and 394,688.16

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Solution

The fourth proportional to 716,967.72, 989,432.82 and 394,688.16 is: 544,679.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,967.72 : 989,432.82 = 394,688.16 : x
  2. Step 2: Convert to fraction form
    716,967.72/989,432.82 = 394,688.16/x
  3. Step 3: Cross multiply
    716,967.72x = 989,432.82 × 394,688.16
  4. Step 4: Simplify right side
    716,967.72x = 390,517,419,169.41
  5. Step 5: Solve for x
    x = 390,517,419,169.41/716,967.72
  6. Step 6: Final answer
    x = 544,679.22

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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.