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Finding the Fourth Proportional to 561,443.58, 841,915.20 and 161,989.38

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Solution

The fourth proportional to 561,443.58, 841,915.20 and 161,989.38 is: 242,911.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,443.58 : 841,915.20 = 161,989.38 : x
  2. Step 2: Convert to fraction form
    561,443.58/841,915.20 = 161,989.38/x
  3. Step 3: Cross multiply
    561,443.58x = 841,915.20 × 161,989.38
  4. Step 4: Simplify right side
    561,443.58x = 136,381,321,260.58
  5. Step 5: Solve for x
    x = 136,381,321,260.58/561,443.58
  6. Step 6: Final answer
    x = 242,911.89

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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.