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Finding the Fourth Proportional to 721,590.93, 995,780.59 and 399,300.84

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Solution

The fourth proportional to 721,590.93, 995,780.59 and 399,300.84 is: 551,026.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,590.93 : 995,780.59 = 399,300.84 : x
  2. Step 2: Convert to fraction form
    721,590.93/995,780.59 = 399,300.84/x
  3. Step 3: Cross multiply
    721,590.93x = 995,780.59 × 399,300.84
  4. Step 4: Simplify right side
    721,590.93x = 397,616,025,044.44
  5. Step 5: Solve for x
    x = 397,616,025,044.44/721,590.93
  6. Step 6: Final answer
    x = 551,026.92

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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.