Home / 520,928,987.76-780,799,097.88-209,837,542.68

Finding the Fourth Proportional to 520,928,987.76, 780,799,097.88 and 209,837,542.68

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Solution

The fourth proportional to 520,928,987.76, 780,799,097.88 and 209,837,542.68 is: 314,516,887.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,928,987.76 : 780,799,097.88 = 209,837,542.68 : x
  2. Step 2: Convert to fraction form
    520,928,987.76/780,799,097.88 = 209,837,542.68/x
  3. Step 3: Cross multiply
    520,928,987.76x = 780,799,097.88 × 209,837,542.68
  4. Step 4: Simplify right side
    520,928,987.76x = 163,840,964,025,900,000
  5. Step 5: Solve for x
    x = 163,840,964,025,900,000/520,928,987.76
  6. Step 6: Final answer
    x = 314,516,887.86

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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.