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Finding the Fourth Proportional to 638,168,430.80, 957,119,935.80 and 274,674,645.20

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Solution

The fourth proportional to 638,168,430.80, 957,119,935.80 and 274,674,645.20 is: 411,954,847.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,168,430.80 : 957,119,935.80 = 274,674,645.20 : x
  2. Step 2: Convert to fraction form
    638,168,430.80/957,119,935.80 = 274,674,645.20/x
  3. Step 3: Cross multiply
    638,168,430.80x = 957,119,935.80 × 274,674,645.20
  4. Step 4: Simplify right side
    638,168,430.80x = 262,896,578,779,711,744
  5. Step 5: Solve for x
    x = 262,896,578,779,711,744/638,168,430.80
  6. Step 6: Final answer
    x = 411,954,847.80

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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.