Home / 805,889,139.20-1,208,833,708.80-260,685,785.60

Finding the Fourth Proportional to 805,889,139.20, 1,208,833,708.80 and 260,685,785.60

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Solution

The fourth proportional to 805,889,139.20, 1,208,833,708.80 and 260,685,785.60 is: 391,028,678.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,889,139.20 : 1,208,833,708.80 = 260,685,785.60 : x
  2. Step 2: Convert to fraction form
    805,889,139.20/1,208,833,708.80 = 260,685,785.60/x
  3. Step 3: Cross multiply
    805,889,139.20x = 1,208,833,708.80 × 260,685,785.60
  4. Step 4: Simplify right side
    805,889,139.20x = 315,125,765,038,289,600
  5. Step 5: Solve for x
    x = 315,125,765,038,289,600/805,889,139.20
  6. Step 6: Final answer
    x = 391,028,678.40

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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.