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Finding the Fourth Proportional to 563,143.34, 777,131.63 and 305,013.87

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Solution

The fourth proportional to 563,143.34, 777,131.63 and 305,013.87 is: 420,915.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,143.34 : 777,131.63 = 305,013.87 : x
  2. Step 2: Convert to fraction form
    563,143.34/777,131.63 = 305,013.87/x
  3. Step 3: Cross multiply
    563,143.34x = 777,131.63 × 305,013.87
  4. Step 4: Simplify right side
    563,143.34x = 237,035,925,584.44
  5. Step 5: Solve for x
    x = 237,035,925,584.44/563,143.34
  6. Step 6: Final answer
    x = 420,915.79

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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.