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Finding the Fourth Proportional to 721,457.78, 995,369.97 and 415,528.04

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Solution

The fourth proportional to 721,457.78, 995,369.97 and 415,528.04 is: 573,289.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,457.78 : 995,369.97 = 415,528.04 : x
  2. Step 2: Convert to fraction form
    721,457.78/995,369.97 = 415,528.04/x
  3. Step 3: Cross multiply
    721,457.78x = 995,369.97 × 415,528.04
  4. Step 4: Simplify right side
    721,457.78x = 413,604,125,654.47
  5. Step 5: Solve for x
    x = 413,604,125,654.47/721,457.78
  6. Step 6: Final answer
    x = 573,289.44

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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.