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Finding the Fourth Proportional to 685,390.32, 945,807.77 and 379,445.22

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Solution

The fourth proportional to 685,390.32, 945,807.77 and 379,445.22 is: 523,617.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,390.32 : 945,807.77 = 379,445.22 : x
  2. Step 2: Convert to fraction form
    685,390.32/945,807.77 = 379,445.22/x
  3. Step 3: Cross multiply
    685,390.32x = 945,807.77 × 379,445.22
  4. Step 4: Simplify right side
    685,390.32x = 358,882,238,313.97
  5. Step 5: Solve for x
    x = 358,882,238,313.97/685,390.32
  6. Step 6: Final answer
    x = 523,617.31

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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.