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Finding the Fourth Proportional to 1,265,810.65, 1,746,473.25 and 721,748.02

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Solution

The fourth proportional to 1,265,810.65, 1,746,473.25 and 721,748.02 is: 995,815.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265,810.65 : 1,746,473.25 = 721,748.02 : x
  2. Step 2: Convert to fraction form
    1,265,810.65/1,746,473.25 = 721,748.02/x
  3. Step 3: Cross multiply
    1,265,810.65x = 1,746,473.25 × 721,748.02
  4. Step 4: Simplify right side
    1,265,810.65x = 1,260,513,610,170.47
  5. Step 5: Solve for x
    x = 1,260,513,610,170.47/1,265,810.65
  6. Step 6: Final answer
    x = 995,815.30

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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.