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Finding the Fourth Proportional to 545,128.70, 816,915.45 and 401,855.90

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Solution

The fourth proportional to 545,128.70, 816,915.45 and 401,855.90 is: 602,210.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,128.70 : 816,915.45 = 401,855.90 : x
  2. Step 2: Convert to fraction form
    545,128.70/816,915.45 = 401,855.90/x
  3. Step 3: Cross multiply
    545,128.70x = 816,915.45 × 401,855.90
  4. Step 4: Simplify right side
    545,128.70x = 328,282,293,383.66
  5. Step 5: Solve for x
    x = 328,282,293,383.66/545,128.70
  6. Step 6: Final answer
    x = 602,210.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.