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Finding the Fourth Proportional to 663,756,999.20, 927,109,890.40 and 663,756,999.20

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Solution

The fourth proportional to 663,756,999.20, 927,109,890.40 and 663,756,999.20 is: 927,109,890.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,756,999.20 : 927,109,890.40 = 663,756,999.20 : x
  2. Step 2: Convert to fraction form
    663,756,999.20/927,109,890.40 = 663,756,999.20/x
  3. Step 3: Cross multiply
    663,756,999.20x = 927,109,890.40 × 663,756,999.20
  4. Step 4: Simplify right side
    663,756,999.20x = 615,375,678,780,544,896
  5. Step 5: Solve for x
    x = 615,375,678,780,544,896/663,756,999.20
  6. Step 6: Final answer
    x = 927,109,890.40

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.