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Finding the Fourth Proportional to 402,349.70, 555,243.30 and 221,060.05

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Solution

The fourth proportional to 402,349.70, 555,243.30 and 221,060.05 is: 305,063.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,349.70 : 555,243.30 = 221,060.05 : x
  2. Step 2: Convert to fraction form
    402,349.70/555,243.30 = 221,060.05/x
  3. Step 3: Cross multiply
    402,349.70x = 555,243.30 × 221,060.05
  4. Step 4: Simplify right side
    402,349.70x = 122,742,111,660.17
  5. Step 5: Solve for x
    x = 122,742,111,660.17/402,349.70
  6. Step 6: Final answer
    x = 305,063.26

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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.