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Finding the Fourth Proportional to 403,013.80, 604,520.70 and 284,915.80

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Solution

The fourth proportional to 403,013.80, 604,520.70 and 284,915.80 is: 427,373.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,013.80 : 604,520.70 = 284,915.80 : x
  2. Step 2: Convert to fraction form
    403,013.80/604,520.70 = 284,915.80/x
  3. Step 3: Cross multiply
    403,013.80x = 604,520.70 × 284,915.80
  4. Step 4: Simplify right side
    403,013.80x = 172,237,498,857.06
  5. Step 5: Solve for x
    x = 172,237,498,857.06/403,013.80
  6. Step 6: Final answer
    x = 427,373.70

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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.