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Finding the Fourth Proportional to 638,688.42, 881,349.75 and 366,564.78

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Solution

The fourth proportional to 638,688.42, 881,349.75 and 366,564.78 is: 505,836.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,688.42 : 881,349.75 = 366,564.78 : x
  2. Step 2: Convert to fraction form
    638,688.42/881,349.75 = 366,564.78/x
  3. Step 3: Cross multiply
    638,688.42x = 881,349.75 × 366,564.78
  4. Step 4: Simplify right side
    638,688.42x = 323,071,777,211.81
  5. Step 5: Solve for x
    x = 323,071,777,211.81/638,688.42
  6. Step 6: Final answer
    x = 505,836.28

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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.