Home / 812,689,188.22-1,121,492,005.04-478,183,376.55

Finding the Fourth Proportional to 812,689,188.22, 1,121,492,005.04 and 478,183,376.55

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Solution

The fourth proportional to 812,689,188.22, 1,121,492,005.04 and 478,183,376.55 is: 659,881,836.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,689,188.22 : 1,121,492,005.04 = 478,183,376.55 : x
  2. Step 2: Convert to fraction form
    812,689,188.22/1,121,492,005.04 = 478,183,376.55/x
  3. Step 3: Cross multiply
    812,689,188.22x = 1,121,492,005.04 × 478,183,376.55
  4. Step 4: Simplify right side
    812,689,188.22x = 536,278,833,741,465,984
  5. Step 5: Solve for x
    x = 536,278,833,741,465,984/812,689,188.22
  6. Step 6: Final answer
    x = 659,881,836.15

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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.