Home / 812,689,190.06-1,121,492,007.58-478,183,378.39

Finding the Fourth Proportional to 812,689,190.06, 1,121,492,007.58 and 478,183,378.39

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Solution

The fourth proportional to 812,689,190.06, 1,121,492,007.58 and 478,183,378.39 is: 659,881,838.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,689,190.06 : 1,121,492,007.58 = 478,183,378.39 : x
  2. Step 2: Convert to fraction form
    812,689,190.06/1,121,492,007.58 = 478,183,378.39/x
  3. Step 3: Cross multiply
    812,689,190.06x = 1,121,492,007.58 × 478,183,378.39
  4. Step 4: Simplify right side
    812,689,190.06x = 536,278,837,021,987,840
  5. Step 5: Solve for x
    x = 536,278,837,021,987,840/812,689,190.06
  6. Step 6: Final answer
    x = 659,881,838.69

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.