Home / 646,081,966.40-969,122,949.60-388,092,948.80

Finding the Fourth Proportional to 646,081,966.40, 969,122,949.60 and 388,092,948.80

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Solution

The fourth proportional to 646,081,966.40, 969,122,949.60 and 388,092,948.80 is: 582,139,423.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,081,966.40 : 969,122,949.60 = 388,092,948.80 : x
  2. Step 2: Convert to fraction form
    646,081,966.40/969,122,949.60 = 388,092,948.80/x
  3. Step 3: Cross multiply
    646,081,966.40x = 969,122,949.60 × 388,092,948.80
  4. Step 4: Simplify right side
    646,081,966.40x = 376,109,783,260,017,792
  5. Step 5: Solve for x
    x = 376,109,783,260,017,792/646,081,966.40
  6. Step 6: Final answer
    x = 582,139,423.20

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Double scale
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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.