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Finding the Fourth Proportional to 646,941.20, 970,411.80 and 617,910.80

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Solution

The fourth proportional to 646,941.20, 970,411.80 and 617,910.80 is: 926,866.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,941.20 : 970,411.80 = 617,910.80 : x
  2. Step 2: Convert to fraction form
    646,941.20/970,411.80 = 617,910.80/x
  3. Step 3: Cross multiply
    646,941.20x = 970,411.80 × 617,910.80
  4. Step 4: Simplify right side
    646,941.20x = 599,627,931,667.44
  5. Step 5: Solve for x
    x = 599,627,931,667.44/646,941.20
  6. Step 6: Final answer
    x = 926,866.20

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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.