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Finding the Fourth Proportional to 572,255.72, 789,749.80 and 317,606.91

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Solution

The fourth proportional to 572,255.72, 789,749.80 and 317,606.91 is: 438,318.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,255.72 : 789,749.80 = 317,606.91 : x
  2. Step 2: Convert to fraction form
    572,255.72/789,749.80 = 317,606.91/x
  3. Step 3: Cross multiply
    572,255.72x = 789,749.80 × 317,606.91
  4. Step 4: Simplify right side
    572,255.72x = 250,829,992,857.10
  5. Step 5: Solve for x
    x = 250,829,992,857.10/572,255.72
  6. Step 6: Final answer
    x = 438,318.02

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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.