Home / 817,928.32-1,128,719.08-455,352.20

Finding the Fourth Proportional to 817,928.32, 1,128,719.08 and 455,352.20

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Solution

The fourth proportional to 817,928.32, 1,128,719.08 and 455,352.20 is: 628,373.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,928.32 : 1,128,719.08 = 455,352.20 : x
  2. Step 2: Convert to fraction form
    817,928.32/1,128,719.08 = 455,352.20/x
  3. Step 3: Cross multiply
    817,928.32x = 1,128,719.08 × 455,352.20
  4. Step 4: Simplify right side
    817,928.32x = 513,964,716,259.98
  5. Step 5: Solve for x
    x = 513,964,716,259.98/817,928.32
  6. Step 6: Final answer
    x = 628,373.79

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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.