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Finding the Fourth Proportional to 438,740.40, 657,916.20 and 202,155.60

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Solution

The fourth proportional to 438,740.40, 657,916.20 and 202,155.60 is: 303,143.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,740.40 : 657,916.20 = 202,155.60 : x
  2. Step 2: Convert to fraction form
    438,740.40/657,916.20 = 202,155.60/x
  3. Step 3: Cross multiply
    438,740.40x = 657,916.20 × 202,155.60
  4. Step 4: Simplify right side
    438,740.40x = 133,001,444,160.72
  5. Step 5: Solve for x
    x = 133,001,444,160.72/438,740.40
  6. Step 6: Final answer
    x = 303,143.83

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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.