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Finding the Fourth Proportional to 402,515.29, 555,476.85 and 221,243.98

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Solution

The fourth proportional to 402,515.29, 555,476.85 and 221,243.98 is: 305,319.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,515.29 : 555,476.85 = 221,243.98 : x
  2. Step 2: Convert to fraction form
    402,515.29/555,476.85 = 221,243.98/x
  3. Step 3: Cross multiply
    402,515.29x = 555,476.85 × 221,243.98
  4. Step 4: Simplify right side
    402,515.29x = 122,895,909,091.86
  5. Step 5: Solve for x
    x = 122,895,909,091.86/402,515.29
  6. Step 6: Final answer
    x = 305,319.85

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.