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Finding the Fourth Proportional to 567,420.41, 783,039.98 and 312,775.85

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Solution

The fourth proportional to 567,420.41, 783,039.98 and 312,775.85 is: 431,630.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    567,420.41 : 783,039.98 = 312,775.85 : x
  2. Step 2: Convert to fraction form
    567,420.41/783,039.98 = 312,775.85/x
  3. Step 3: Cross multiply
    567,420.41x = 783,039.98 × 312,775.85
  4. Step 4: Simplify right side
    567,420.41x = 244,915,993,764.60
  5. Step 5: Solve for x
    x = 244,915,993,764.60/567,420.41
  6. Step 6: Final answer
    x = 431,630.57

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1.5x scale

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.