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Finding the Fourth Proportional to 402,008.70, 554,774.52 and 220,728.54

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Solution

The fourth proportional to 402,008.70, 554,774.52 and 220,728.54 is: 304,606.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,008.70 : 554,774.52 = 220,728.54 : x
  2. Step 2: Convert to fraction form
    402,008.70/554,774.52 = 220,728.54/x
  3. Step 3: Cross multiply
    402,008.70x = 554,774.52 × 220,728.54
  4. Step 4: Simplify right side
    402,008.70x = 122,454,569,828.80
  5. Step 5: Solve for x
    x = 122,454,569,828.80/402,008.70
  6. Step 6: Final answer
    x = 304,606.77

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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.