Home / 638,419,052.70-957,628,579.05-420,315,666.30

Finding the Fourth Proportional to 638,419,052.70, 957,628,579.05 and 420,315,666.30

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Solution

The fourth proportional to 638,419,052.70, 957,628,579.05 and 420,315,666.30 is: 630,473,499.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,419,052.70 : 957,628,579.05 = 420,315,666.30 : x
  2. Step 2: Convert to fraction form
    638,419,052.70/957,628,579.05 = 420,315,666.30/x
  3. Step 3: Cross multiply
    638,419,052.70x = 957,628,579.05 × 420,315,666.30
  4. Step 4: Simplify right side
    638,419,052.70x = 402,506,294,271,322,944
  5. Step 5: Solve for x
    x = 402,506,294,271,322,944/638,419,052.70
  6. Step 6: Final answer
    x = 630,473,499.45

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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.