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Finding the Fourth Proportional to 974,309,212.80, 1,461,463,819.20 and 905,434,459.20

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Solution

The fourth proportional to 974,309,212.80, 1,461,463,819.20 and 905,434,459.20 is: 1,358,151,688.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    974,309,212.80 : 1,461,463,819.20 = 905,434,459.20 : x
  2. Step 2: Convert to fraction form
    974,309,212.80/1,461,463,819.20 = 905,434,459.20/x
  3. Step 3: Cross multiply
    974,309,212.80x = 1,461,463,819.20 × 905,434,459.20
  4. Step 4: Simplify right side
    974,309,212.80x = 1,323,259,702,777,718,784
  5. Step 5: Solve for x
    x = 1,323,259,702,777,718,784/974,309,212.80
  6. Step 6: Final answer
    x = 1,358,151,688.80

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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.