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Finding the Fourth Proportional to 684,915.65, 944,954.69 and 398,374.91

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Solution

The fourth proportional to 684,915.65, 944,954.69 and 398,374.91 is: 549,624.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,915.65 : 944,954.69 = 398,374.91 : x
  2. Step 2: Convert to fraction form
    684,915.65/944,954.69 = 398,374.91/x
  3. Step 3: Cross multiply
    684,915.65x = 944,954.69 × 398,374.91
  4. Step 4: Simplify right side
    684,915.65x = 376,446,239,582.83
  5. Step 5: Solve for x
    x = 376,446,239,582.83/684,915.65
  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.