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Finding the Fourth Proportional to 646,949.20, 970,423.80 and 617,918.80

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Solution

The fourth proportional to 646,949.20, 970,423.80 and 617,918.80 is: 926,878.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,949.20 : 970,423.80 = 617,918.80 : x
  2. Step 2: Convert to fraction form
    646,949.20/970,423.80 = 617,918.80/x
  3. Step 3: Cross multiply
    646,949.20x = 970,423.80 × 617,918.80
  4. Step 4: Simplify right side
    646,949.20x = 599,643,109,987.44
  5. Step 5: Solve for x
    x = 599,643,109,987.44/646,949.20
  6. Step 6: Final answer
    x = 926,878.20

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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.