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Finding the Fourth Proportional to 563,997.70, 778,311.48 and 305,880.31

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Solution

The fourth proportional to 563,997.70, 778,311.48 and 305,880.31 is: 422,111.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,997.70 : 778,311.48 = 305,880.31 : x
  2. Step 2: Convert to fraction form
    563,997.70/778,311.48 = 305,880.31/x
  3. Step 3: Cross multiply
    563,997.70x = 778,311.48 × 305,880.31
  4. Step 4: Simplify right side
    563,997.70x = 238,070,156,778.96
  5. Step 5: Solve for x
    x = 238,070,156,778.96/563,997.70
  6. Step 6: Final answer
    x = 422,111.93

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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.