Home / 685,627.40-945,724.80-430,535.72

Finding the Fourth Proportional to 685,627.40, 945,724.80 and 430,535.72

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Solution

The fourth proportional to 685,627.40, 945,724.80 and 430,535.72 is: 593,862.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,627.40 : 945,724.80 = 430,535.72 : x
  2. Step 2: Convert to fraction form
    685,627.40/945,724.80 = 430,535.72/x
  3. Step 3: Cross multiply
    685,627.40x = 945,724.80 × 430,535.72
  4. Step 4: Simplify right side
    685,627.40x = 407,168,307,689.86
  5. Step 5: Solve for x
    x = 407,168,307,689.86/685,627.40
  6. Step 6: Final answer
    x = 593,862.36

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Half scale
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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.