Home / 817,685.82-1,128,394.96-455,109.77

Finding the Fourth Proportional to 817,685.82, 1,128,394.96 and 455,109.77

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Solution

The fourth proportional to 817,685.82, 1,128,394.96 and 455,109.77 is: 628,045.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,685.82 : 1,128,394.96 = 455,109.77 : x
  2. Step 2: Convert to fraction form
    817,685.82/1,128,394.96 = 455,109.77/x
  3. Step 3: Cross multiply
    817,685.82x = 1,128,394.96 × 455,109.77
  4. Step 4: Simplify right side
    817,685.82x = 513,543,572,397.97
  5. Step 5: Solve for x
    x = 513,543,572,397.97/817,685.82
  6. Step 6: Final answer
    x = 628,045.10

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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.