Home / 786,738,738.90-1,180,821,945.15-398,831,423.70

Finding the Fourth Proportional to 786,738,738.90, 1,180,821,945.15 and 398,831,423.70

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Solution

The fourth proportional to 786,738,738.90, 1,180,821,945.15 and 398,831,423.70 is: 598,609,009.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,738,738.90 : 1,180,821,945.15 = 398,831,423.70 : x
  2. Step 2: Convert to fraction form
    786,738,738.90/1,180,821,945.15 = 398,831,423.70/x
  3. Step 3: Cross multiply
    786,738,738.90x = 1,180,821,945.15 × 398,831,423.70
  4. Step 4: Simplify right side
    786,738,738.90x = 470,948,897,520,377,856
  5. Step 5: Solve for x
    x = 470,948,897,520,377,856/786,738,738.90
  6. Step 6: Final answer
    x = 598,609,009.87

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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.