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Finding the Fourth Proportional to 522,561.47, 721,131.86 and 289,986.08

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Solution

The fourth proportional to 522,561.47, 721,131.86 and 289,986.08 is: 400,179.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,561.47 : 721,131.86 = 289,986.08 : x
  2. Step 2: Convert to fraction form
    522,561.47/721,131.86 = 289,986.08/x
  3. Step 3: Cross multiply
    522,561.47x = 721,131.86 × 289,986.08
  4. Step 4: Simplify right side
    522,561.47x = 209,118,199,794.58
  5. Step 5: Solve for x
    x = 209,118,199,794.58/522,561.47
  6. Step 6: Final answer
    x = 400,179.14

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1.5x scale

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.