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Finding the Fourth Proportional to 371,446.40, 557,172.80 and 105,212.80

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Solution

The fourth proportional to 371,446.40, 557,172.80 and 105,212.80 is: 157,820.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,446.40 : 557,172.80 = 105,212.80 : x
  2. Step 2: Convert to fraction form
    371,446.40/557,172.80 = 105,212.80/x
  3. Step 3: Cross multiply
    371,446.40x = 557,172.80 × 105,212.80
  4. Step 4: Simplify right side
    371,446.40x = 58,621,710,371.84
  5. Step 5: Solve for x
    x = 58,621,710,371.84/371,446.40
  6. Step 6: Final answer
    x = 157,820.11

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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.