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Finding the Fourth Proportional to 402,803.52, 555,857.76 and 221,515.44

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Solution

The fourth proportional to 402,803.52, 555,857.76 and 221,515.44 is: 305,685.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,803.52 : 555,857.76 = 221,515.44 : x
  2. Step 2: Convert to fraction form
    402,803.52/555,857.76 = 221,515.44/x
  3. Step 3: Cross multiply
    402,803.52x = 555,857.76 × 221,515.44
  4. Step 4: Simplify right side
    402,803.52x = 123,131,076,283.81
  5. Step 5: Solve for x
    x = 123,131,076,283.81/402,803.52
  6. Step 6: Final answer
    x = 305,685.20

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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.