Home / 772,415,785.20-1,159,967,370.60-409,618,729.20

Finding the Fourth Proportional to 772,415,785.20, 1,159,967,370.60 and 409,618,729.20

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Solution

The fourth proportional to 772,415,785.20, 1,159,967,370.60 and 409,618,729.20 is: 615,140,665.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,415,785.20 : 1,159,967,370.60 = 409,618,729.20 : x
  2. Step 2: Convert to fraction form
    772,415,785.20/1,159,967,370.60 = 409,618,729.20/x
  3. Step 3: Cross multiply
    772,415,785.20x = 1,159,967,370.60 × 409,618,729.20
  4. Step 4: Simplify right side
    772,415,785.20x = 475,144,360,258,637,376
  5. Step 5: Solve for x
    x = 475,144,360,258,637,376/772,415,785.20
  6. Step 6: Final answer
    x = 615,140,665.64

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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.