Home / 817,790.91-1,128,588.66-455,237.76

Finding the Fourth Proportional to 817,790.91, 1,128,588.66 and 455,237.76

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Solution

The fourth proportional to 817,790.91, 1,128,588.66 and 455,237.76 is: 628,248.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,790.91 : 1,128,588.66 = 455,237.76 : x
  2. Step 2: Convert to fraction form
    817,790.91/1,128,588.66 = 455,237.76/x
  3. Step 3: Cross multiply
    817,790.91x = 1,128,588.66 × 455,237.76
  4. Step 4: Simplify right side
    817,790.91x = 513,776,173,539.80
  5. Step 5: Solve for x
    x = 513,776,173,539.80/817,790.91
  6. Step 6: Final answer
    x = 628,248.82

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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.