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Finding the Fourth Proportional to 716,862.18, 989,261.96 and 394,565.34

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Solution

The fourth proportional to 716,862.18, 989,261.96 and 394,565.34 is: 544,495.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,862.18 : 989,261.96 = 394,565.34 : x
  2. Step 2: Convert to fraction form
    716,862.18/989,261.96 = 394,565.34/x
  3. Step 3: Cross multiply
    716,862.18x = 989,261.96 × 394,565.34
  4. Step 4: Simplify right side
    716,862.18x = 390,328,479,623.64
  5. Step 5: Solve for x
    x = 390,328,479,623.64/716,862.18
  6. Step 6: Final answer
    x = 544,495.85

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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.