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Finding the Fourth Proportional to 567,488.20, 783,128.58 and 312,839.39

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Solution

The fourth proportional to 567,488.20, 783,128.58 and 312,839.39 is: 431,715.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    567,488.20 : 783,128.58 = 312,839.39 : x
  2. Step 2: Convert to fraction form
    567,488.20/783,128.58 = 312,839.39/x
  3. Step 3: Cross multiply
    567,488.20x = 783,128.58 × 312,839.39
  4. Step 4: Simplify right side
    567,488.20x = 244,993,467,258.77
  5. Step 5: Solve for x
    x = 244,993,467,258.77/567,488.20
  6. Step 6: Final answer
    x = 431,715.53

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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.