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Finding the Fourth Proportional to 685,059.66, 945,362.88 and 379,148.58

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Solution

The fourth proportional to 685,059.66, 945,362.88 and 379,148.58 is: 523,214.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,059.66 : 945,362.88 = 379,148.58 : x
  2. Step 2: Convert to fraction form
    685,059.66/945,362.88 = 379,148.58/x
  3. Step 3: Cross multiply
    685,059.66x = 945,362.88 × 379,148.58
  4. Step 4: Simplify right side
    685,059.66x = 358,432,993,536.71
  5. Step 5: Solve for x
    x = 358,432,993,536.71/685,059.66
  6. Step 6: Final answer
    x = 523,214.28

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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.