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Finding the Fourth Proportional to 718,524,226.88, 991,557,662.88 and 417,137,506.88

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Solution

The fourth proportional to 718,524,226.88, 991,557,662.88 and 417,137,506.88 is: 575,646,409.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,524,226.88 : 991,557,662.88 = 417,137,506.88 : x
  2. Step 2: Convert to fraction form
    718,524,226.88/991,557,662.88 = 417,137,506.88/x
  3. Step 3: Cross multiply
    718,524,226.88x = 991,557,662.88 × 417,137,506.88
  4. Step 4: Simplify right side
    718,524,226.88x = 413,615,891,421,522,688
  5. Step 5: Solve for x
    x = 413,615,891,421,522,688/718,524,226.88
  6. Step 6: Final answer
    x = 575,646,409.61

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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.