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Finding the Fourth Proportional to 371,640.80, 557,461.20 and 309,639.35

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Solution

The fourth proportional to 371,640.80, 557,461.20 and 309,639.35 is: 464,459.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,640.80 : 557,461.20 = 309,639.35 : x
  2. Step 2: Convert to fraction form
    371,640.80/557,461.20 = 309,639.35/x
  3. Step 3: Cross multiply
    371,640.80x = 557,461.20 × 309,639.35
  4. Step 4: Simplify right side
    371,640.80x = 172,611,923,618.22
  5. Step 5: Solve for x
    x = 172,611,923,618.22/371,640.80
  6. Step 6: Final answer
    x = 464,459.03

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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.