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Finding the Fourth Proportional to 383,011.90, 528,164.40 and 253,905.46

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Solution

The fourth proportional to 383,011.90, 528,164.40 and 253,905.46 is: 350,129.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,011.90 : 528,164.40 = 253,905.46 : x
  2. Step 2: Convert to fraction form
    383,011.90/528,164.40 = 253,905.46/x
  3. Step 3: Cross multiply
    383,011.90x = 528,164.40 × 253,905.46
  4. Step 4: Simplify right side
    383,011.90x = 134,103,824,937.62
  5. Step 5: Solve for x
    x = 134,103,824,937.62/383,011.90
  6. Step 6: Final answer
    x = 350,129.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.