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Finding the Fourth Proportional to 697,039,747.20, 1,045,559,620.80 and 665,295,004.80

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Solution

The fourth proportional to 697,039,747.20, 1,045,559,620.80 and 665,295,004.80 is: 997,942,507.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,039,747.20 : 1,045,559,620.80 = 665,295,004.80 : x
  2. Step 2: Convert to fraction form
    697,039,747.20/1,045,559,620.80 = 665,295,004.80/x
  3. Step 3: Cross multiply
    697,039,747.20x = 1,045,559,620.80 × 665,295,004.80
  4. Step 4: Simplify right side
    697,039,747.20x = 695,605,592,938,822,144
  5. Step 5: Solve for x
    x = 695,605,592,938,822,144/697,039,747.20
  6. Step 6: Final answer
    x = 997,942,507.20

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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.