Home / 817,609.25-1,128,300.78-455,118.74

Finding the Fourth Proportional to 817,609.25, 1,128,300.78 and 455,118.74

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Solution

The fourth proportional to 817,609.25, 1,128,300.78 and 455,118.74 is: 628,063.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,609.25 : 1,128,300.78 = 455,118.74 : x
  2. Step 2: Convert to fraction form
    817,609.25/1,128,300.78 = 455,118.74/x
  3. Step 3: Cross multiply
    817,609.25x = 1,128,300.78 × 455,118.74
  4. Step 4: Simplify right side
    817,609.25x = 513,510,822,617.53
  5. Step 5: Solve for x
    x = 513,510,822,617.53/817,609.25
  6. Step 6: Final answer
    x = 628,063.86

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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.