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Finding the Fourth Proportional to 420,043.52, 579,674.60 and 238,763.04

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Solution

The fourth proportional to 420,043.52, 579,674.60 and 238,763.04 is: 329,501.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,043.52 : 579,674.60 = 238,763.04 : x
  2. Step 2: Convert to fraction form
    420,043.52/579,674.60 = 238,763.04/x
  3. Step 3: Cross multiply
    420,043.52x = 579,674.60 × 238,763.04
  4. Step 4: Simplify right side
    420,043.52x = 138,404,869,706.78
  5. Step 5: Solve for x
    x = 138,404,869,706.78/420,043.52
  6. Step 6: Final answer
    x = 329,501.26

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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.