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Finding the Fourth Proportional to 685,347.44, 945,780.72 and 379,445

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Solution

The fourth proportional to 685,347.44, 945,780.72 and 379,445 is: 523,634.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,347.44 : 945,780.72 = 379,445 : x
  2. Step 2: Convert to fraction form
    685,347.44/945,780.72 = 379,445/x
  3. Step 3: Cross multiply
    685,347.44x = 945,780.72 × 379,445
  4. Step 4: Simplify right side
    685,347.44x = 358,871,765,300.40
  5. Step 5: Solve for x
    x = 358,871,765,300.40/685,347.44
  6. Step 6: Final answer
    x = 523,634.79

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1.5x scale

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.