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Finding the Fourth Proportional to 638,925,978.78, 955,867,313.16 and 483,926,290.38

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Solution

The fourth proportional to 638,925,978.78, 955,867,313.16 and 483,926,290.38 is: 723,979,519.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,925,978.78 : 955,867,313.16 = 483,926,290.38 : x
  2. Step 2: Convert to fraction form
    638,925,978.78/955,867,313.16 = 483,926,290.38/x
  3. Step 3: Cross multiply
    638,925,978.78x = 955,867,313.16 × 483,926,290.38
  4. Step 4: Simplify right side
    638,925,978.78x = 462,569,322,953,016,512
  5. Step 5: Solve for x
    x = 462,569,322,953,016,512/638,925,978.78
  6. Step 6: Final answer
    x = 723,979,519.25

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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.