Home / 402,408,015.20-603,612,022.80-399,857,098.40

Finding the Fourth Proportional to 402,408,015.20, 603,612,022.80 and 399,857,098.40

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Solution

The fourth proportional to 402,408,015.20, 603,612,022.80 and 399,857,098.40 is: 599,785,647.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,408,015.20 : 603,612,022.80 = 399,857,098.40 : x
  2. Step 2: Convert to fraction form
    402,408,015.20/603,612,022.80 = 399,857,098.40/x
  3. Step 3: Cross multiply
    402,408,015.20x = 603,612,022.80 × 399,857,098.40
  4. Step 4: Simplify right side
    402,408,015.20x = 241,358,551,996,162,624
  5. Step 5: Solve for x
    x = 241,358,551,996,162,624/402,408,015.20
  6. Step 6: Final answer
    x = 599,785,647.60

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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.