Home / 721,623.16-995,815.45-399,346.84

Finding the Fourth Proportional to 721,623.16, 995,815.45 and 399,346.84

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Solution

The fourth proportional to 721,623.16, 995,815.45 and 399,346.84 is: 551,085.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,623.16 : 995,815.45 = 399,346.84 : x
  2. Step 2: Convert to fraction form
    721,623.16/995,815.45 = 399,346.84/x
  3. Step 3: Cross multiply
    721,623.16x = 995,815.45 × 399,346.84
  4. Step 4: Simplify right side
    721,623.16x = 397,675,754,924.63
  5. Step 5: Solve for x
    x = 397,675,754,924.63/721,623.16
  6. Step 6: Final answer
    x = 551,085.08

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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.