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Finding the Fourth Proportional to 718,522,798.60, 991,555,686.52 and 417,136,075.66

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Solution

The fourth proportional to 718,522,798.60, 991,555,686.52 and 417,136,075.66 is: 575,644,431.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,522,798.60 : 991,555,686.52 = 417,136,075.66 : x
  2. Step 2: Convert to fraction form
    718,522,798.60/991,555,686.52 = 417,136,075.66/x
  3. Step 3: Cross multiply
    718,522,798.60x = 991,555,686.52 × 417,136,075.66
  4. Step 4: Simplify right side
    718,522,798.60x = 413,613,647,873,309,952
  5. Step 5: Solve for x
    x = 413,613,647,873,309,952/718,522,798.60
  6. Step 6: Final answer
    x = 575,644,431.44

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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.