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Finding the Fourth Proportional to 571,781.82, 789,153.40 and 317,215.02

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Solution

The fourth proportional to 571,781.82, 789,153.40 and 317,215.02 is: 437,809.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,781.82 : 789,153.40 = 317,215.02 : x
  2. Step 2: Convert to fraction form
    571,781.82/789,153.40 = 317,215.02/x
  3. Step 3: Cross multiply
    571,781.82x = 789,153.40 × 317,215.02
  4. Step 4: Simplify right side
    571,781.82x = 250,331,311,564.07
  5. Step 5: Solve for x
    x = 250,331,311,564.07/571,781.82
  6. Step 6: Final answer
    x = 437,809.15

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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.