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Finding the Fourth Proportional to 646,782.80, 970,174.20 and 636,285.20

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Solution

The fourth proportional to 646,782.80, 970,174.20 and 636,285.20 is: 954,427.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,782.80 : 970,174.20 = 636,285.20 : x
  2. Step 2: Convert to fraction form
    646,782.80/970,174.20 = 636,285.20/x
  3. Step 3: Cross multiply
    646,782.80x = 970,174.20 × 636,285.20
  4. Step 4: Simplify right side
    646,782.80x = 617,307,484,881.84
  5. Step 5: Solve for x
    x = 617,307,484,881.84/646,782.80
  6. Step 6: Final answer
    x = 954,427.80

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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.