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Finding the Fourth Proportional to 402,817.99, 555,877.73 and 221,529.90

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Solution

The fourth proportional to 402,817.99, 555,877.73 and 221,529.90 is: 305,705.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,817.99 : 555,877.73 = 221,529.90 : x
  2. Step 2: Convert to fraction form
    402,817.99/555,877.73 = 221,529.90/x
  3. Step 3: Cross multiply
    402,817.99x = 555,877.73 × 221,529.90
  4. Step 4: Simplify right side
    402,817.99x = 123,143,536,831.48
  5. Step 5: Solve for x
    x = 123,143,536,831.48/402,817.99
  6. Step 6: Final answer
    x = 305,705.16

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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.