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Finding the Fourth Proportional to 402,711.60, 555,743.46 and 221,434.96

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Solution

The fourth proportional to 402,711.60, 555,743.46 and 221,434.96 is: 305,581.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,711.60 : 555,743.46 = 221,434.96 : x
  2. Step 2: Convert to fraction form
    402,711.60/555,743.46 = 221,434.96/x
  3. Step 3: Cross multiply
    402,711.60x = 555,743.46 × 221,434.96
  4. Step 4: Simplify right side
    402,711.60x = 123,061,030,835.36
  5. Step 5: Solve for x
    x = 123,061,030,835.36/402,711.60
  6. Step 6: Final answer
    x = 305,581.04

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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.