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Finding the Fourth Proportional to 572,443.92, 789,932.96 and 317,775

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Solution

The fourth proportional to 572,443.92, 789,932.96 and 317,775 is: 438,507.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,443.92 : 789,932.96 = 317,775 : x
  2. Step 2: Convert to fraction form
    572,443.92/789,932.96 = 317,775/x
  3. Step 3: Cross multiply
    572,443.92x = 789,932.96 × 317,775
  4. Step 4: Simplify right side
    572,443.92x = 251,020,946,364
  5. Step 5: Solve for x
    x = 251,020,946,364/572,443.92
  6. Step 6: Final answer
    x = 438,507.49

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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.