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Finding the Fourth Proportional to 640,010.90, 960,016.35 and 628,951.70

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Solution

The fourth proportional to 640,010.90, 960,016.35 and 628,951.70 is: 943,427.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,010.90 : 960,016.35 = 628,951.70 : x
  2. Step 2: Convert to fraction form
    640,010.90/960,016.35 = 628,951.70/x
  3. Step 3: Cross multiply
    640,010.90x = 960,016.35 × 628,951.70
  4. Step 4: Simplify right side
    640,010.90x = 603,803,915,360.30
  5. Step 5: Solve for x
    x = 603,803,915,360.30/640,010.90
  6. Step 6: Final answer
    x = 943,427.55

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.