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Finding the Fourth Proportional to 391,571.40, 587,357.10 and 344,915.40

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Solution

The fourth proportional to 391,571.40, 587,357.10 and 344,915.40 is: 517,373.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,571.40 : 587,357.10 = 344,915.40 : x
  2. Step 2: Convert to fraction form
    391,571.40/587,357.10 = 344,915.40/x
  3. Step 3: Cross multiply
    391,571.40x = 587,357.10 × 344,915.40
  4. Step 4: Simplify right side
    391,571.40x = 202,588,509,089.34
  5. Step 5: Solve for x
    x = 202,588,509,089.34/391,571.40
  6. Step 6: Final answer
    x = 517,373.10

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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.