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Finding the Fourth Proportional to 426,273.40, 638,567.70 and 216,062.20

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Solution

The fourth proportional to 426,273.40, 638,567.70 and 216,062.20 is: 323,666.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,273.40 : 638,567.70 = 216,062.20 : x
  2. Step 2: Convert to fraction form
    426,273.40/638,567.70 = 216,062.20/x
  3. Step 3: Cross multiply
    426,273.40x = 638,567.70 × 216,062.20
  4. Step 4: Simplify right side
    426,273.40x = 137,970,342,110.94
  5. Step 5: Solve for x
    x = 137,970,342,110.94/426,273.40
  6. Step 6: Final answer
    x = 323,666.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.