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Finding the Fourth Proportional to 721,256.42, 995,387.84 and 411,166.40

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Solution

The fourth proportional to 721,256.42, 995,387.84 and 411,166.40 is: 567,440.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,256.42 : 995,387.84 = 411,166.40 : x
  2. Step 2: Convert to fraction form
    721,256.42/995,387.84 = 411,166.40/x
  3. Step 3: Cross multiply
    721,256.42x = 995,387.84 × 411,166.40
  4. Step 4: Simplify right side
    721,256.42x = 409,270,029,285.68
  5. Step 5: Solve for x
    x = 409,270,029,285.68/721,256.42
  6. Step 6: Final answer
    x = 567,440.40

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Double scale
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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.