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Finding the Fourth Proportional to 420,801.18, 580,706.28 and 239,513.11

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Solution

The fourth proportional to 420,801.18, 580,706.28 and 239,513.11 is: 330,528.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,801.18 : 580,706.28 = 239,513.11 : x
  2. Step 2: Convert to fraction form
    420,801.18/580,706.28 = 239,513.11/x
  3. Step 3: Cross multiply
    420,801.18x = 580,706.28 × 239,513.11
  4. Step 4: Simplify right side
    420,801.18x = 139,086,770,761.10
  5. Step 5: Solve for x
    x = 139,086,770,761.10/420,801.18
  6. Step 6: Final answer
    x = 330,528.47

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1.5x scale

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.