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Finding the Fourth Proportional to 374,428.80, 561,643.20 and 187,372.80

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Solution

The fourth proportional to 374,428.80, 561,643.20 and 187,372.80 is: 281,059.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    374,428.80 : 561,643.20 = 187,372.80 : x
  2. Step 2: Convert to fraction form
    374,428.80/561,643.20 = 187,372.80/x
  3. Step 3: Cross multiply
    374,428.80x = 561,643.20 × 187,372.80
  4. Step 4: Simplify right side
    374,428.80x = 105,236,658,984.96
  5. Step 5: Solve for x
    x = 105,236,658,984.96/374,428.80
  6. Step 6: Final answer
    x = 281,059.20

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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.