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Finding the Fourth Proportional to 684,915.66, 944,954.69 and 398,374.92

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Solution

The fourth proportional to 684,915.66, 944,954.69 and 398,374.92 is: 549,624.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,915.66 : 944,954.69 = 398,374.92 : x
  2. Step 2: Convert to fraction form
    684,915.66/944,954.69 = 398,374.92/x
  3. Step 3: Cross multiply
    684,915.66x = 944,954.69 × 398,374.92
  4. Step 4: Simplify right side
    684,915.66x = 376,446,242,315.73
  5. Step 5: Solve for x
    x = 376,446,242,315.73/684,915.66
  6. Step 6: Final answer
    x = 549,624.23

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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.