Home / 643,858,143.60-965,787,215.40-540,546,013.20

Finding the Fourth Proportional to 643,858,143.60, 965,787,215.40 and 540,546,013.20

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Solution

The fourth proportional to 643,858,143.60, 965,787,215.40 and 540,546,013.20 is: 810,819,019.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,858,143.60 : 965,787,215.40 = 540,546,013.20 : x
  2. Step 2: Convert to fraction form
    643,858,143.60/965,787,215.40 = 540,546,013.20/x
  3. Step 3: Cross multiply
    643,858,143.60x = 965,787,215.40 × 540,546,013.20
  4. Step 4: Simplify right side
    643,858,143.60x = 522,052,428,883,999,680
  5. Step 5: Solve for x
    x = 522,052,428,883,999,680/643,858,143.60
  6. Step 6: Final answer
    x = 810,819,019.80

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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.