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Finding the Fourth Proportional to 721,538.64, 995,655.51 and 488,491.52

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Solution

The fourth proportional to 721,538.64, 995,655.51 and 488,491.52 is: 674,072.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,538.64 : 995,655.51 = 488,491.52 : x
  2. Step 2: Convert to fraction form
    721,538.64/995,655.51 = 488,491.52/x
  3. Step 3: Cross multiply
    721,538.64x = 995,655.51 × 488,491.52
  4. Step 4: Simplify right side
    721,538.64x = 486,369,268,498.00
  5. Step 5: Solve for x
    x = 486,369,268,498.00/721,538.64
  6. Step 6: Final answer
    x = 674,072.38

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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.