Home / 811,528,858.54-1,216,535,981.95-320,246,196.49

Finding the Fourth Proportional to 811,528,858.54, 1,216,535,981.95 and 320,246,196.49

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Solution

The fourth proportional to 811,528,858.54, 1,216,535,981.95 and 320,246,196.49 is: 480,070,446.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,528,858.54 : 1,216,535,981.95 = 320,246,196.49 : x
  2. Step 2: Convert to fraction form
    811,528,858.54/1,216,535,981.95 = 320,246,196.49/x
  3. Step 3: Cross multiply
    811,528,858.54x = 1,216,535,981.95 × 320,246,196.49
  4. Step 4: Simplify right side
    811,528,858.54x = 389,591,021,105,030,848
  5. Step 5: Solve for x
    x = 389,591,021,105,030,848/811,528,858.54
  6. Step 6: Final answer
    x = 480,070,446.06

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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.