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Finding the Fourth Proportional to 398,779.53, 550,300.55 and 219,931.53

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Solution

The fourth proportional to 398,779.53, 550,300.55 and 219,931.53 is: 303,497.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,779.53 : 550,300.55 = 219,931.53 : x
  2. Step 2: Convert to fraction form
    398,779.53/550,300.55 = 219,931.53/x
  3. Step 3: Cross multiply
    398,779.53x = 550,300.55 × 219,931.53
  4. Step 4: Simplify right side
    398,779.53x = 121,028,440,821.68
  5. Step 5: Solve for x
    x = 121,028,440,821.68/398,779.53
  6. Step 6: Final answer
    x = 303,497.12

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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.