Home / 687,289,320.68-948,490,495.20-405,043,673.72

Finding the Fourth Proportional to 687,289,320.68, 948,490,495.20 and 405,043,673.72

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Solution

The fourth proportional to 687,289,320.68, 948,490,495.20 and 405,043,673.72 is: 558,978,676.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,289,320.68 : 948,490,495.20 = 405,043,673.72 : x
  2. Step 2: Convert to fraction form
    687,289,320.68/948,490,495.20 = 405,043,673.72/x
  3. Step 3: Cross multiply
    687,289,320.68x = 948,490,495.20 × 405,043,673.72
  4. Step 4: Simplify right side
    687,289,320.68x = 384,180,074,659,567,552
  5. Step 5: Solve for x
    x = 384,180,074,659,567,552/687,289,320.68
  6. Step 6: Final answer
    x = 558,978,676.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.