Home / 685,140.08-945,874.28-413,276.56

Finding the Fourth Proportional to 685,140.08, 945,874.28 and 413,276.56

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Solution

The fourth proportional to 685,140.08, 945,874.28 and 413,276.56 is: 570,551.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,140.08 : 945,874.28 = 413,276.56 : x
  2. Step 2: Convert to fraction form
    685,140.08/945,874.28 = 413,276.56/x
  3. Step 3: Cross multiply
    685,140.08x = 945,874.28 × 413,276.56
  4. Step 4: Simplify right side
    685,140.08x = 390,907,668,630.88
  5. Step 5: Solve for x
    x = 390,907,668,630.88/685,140.08
  6. Step 6: Final answer
    x = 570,551.45

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Double scale
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Similar ratio
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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.