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Finding the Fourth Proportional to 646,885.70, 970,328.55 and 617,855.30

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Solution

The fourth proportional to 646,885.70, 970,328.55 and 617,855.30 is: 926,782.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,885.70 : 970,328.55 = 617,855.30 : x
  2. Step 2: Convert to fraction form
    646,885.70/970,328.55 = 617,855.30/x
  3. Step 3: Cross multiply
    646,885.70x = 970,328.55 × 617,855.30
  4. Step 4: Simplify right side
    646,885.70x = 599,522,637,358.82
  5. Step 5: Solve for x
    x = 599,522,637,358.82/646,885.70
  6. Step 6: Final answer
    x = 926,782.95

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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.