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Finding the Fourth Proportional to 716,859.42, 989,258.16 and 394,562.58

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Solution

The fourth proportional to 716,859.42, 989,258.16 and 394,562.58 is: 544,492.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,859.42 : 989,258.16 = 394,562.58 : x
  2. Step 2: Convert to fraction form
    716,859.42/989,258.16 = 394,562.58/x
  3. Step 3: Cross multiply
    716,859.42x = 989,258.16 × 394,562.58
  4. Step 4: Simplify right side
    716,859.42x = 390,324,251,895.65
  5. Step 5: Solve for x
    x = 390,324,251,895.65/716,859.42
  6. Step 6: Final answer
    x = 544,492.05

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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.