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Finding the Fourth Proportional to 685,404.70, 945,827.61 and 379,459.60

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Solution

The fourth proportional to 685,404.70, 945,827.61 and 379,459.60 is: 523,637.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,404.70 : 945,827.61 = 379,459.60 : x
  2. Step 2: Convert to fraction form
    685,404.70/945,827.61 = 379,459.60/x
  3. Step 3: Cross multiply
    685,404.70x = 945,827.61 × 379,459.60
  4. Step 4: Simplify right side
    685,404.70x = 358,903,366,559.56
  5. Step 5: Solve for x
    x = 358,903,366,559.56/685,404.70
  6. Step 6: Final answer
    x = 523,637.15

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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.