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Finding the Fourth Proportional to 438,627.36, 605,845.53 and 317,576.91

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Solution

The fourth proportional to 438,627.36, 605,845.53 and 317,576.91 is: 438,646.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,627.36 : 605,845.53 = 317,576.91 : x
  2. Step 2: Convert to fraction form
    438,627.36/605,845.53 = 317,576.91/x
  3. Step 3: Cross multiply
    438,627.36x = 605,845.53 × 317,576.91
  4. Step 4: Simplify right side
    438,627.36x = 192,402,551,354.71
  5. Step 5: Solve for x
    x = 192,402,551,354.71/438,627.36
  6. Step 6: Final answer
    x = 438,646.94

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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.