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Finding the Fourth Proportional to 402,087.36, 554,859 and 220,764

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Solution

The fourth proportional to 402,087.36, 554,859 and 220,764 is: 304,642.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,087.36 : 554,859 = 220,764 : x
  2. Step 2: Convert to fraction form
    402,087.36/554,859 = 220,764/x
  3. Step 3: Cross multiply
    402,087.36x = 554,859 × 220,764
  4. Step 4: Simplify right side
    402,087.36x = 122,492,892,276
  5. Step 5: Solve for x
    x = 122,492,892,276/402,087.36
  6. Step 6: Final answer
    x = 304,642.48

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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.