Home / 817,929.32-1,128,720.45-455,353.22

Finding the Fourth Proportional to 817,929.32, 1,128,720.45 and 455,353.22

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Solution

The fourth proportional to 817,929.32, 1,128,720.45 and 455,353.22 is: 628,375.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,929.32 : 1,128,720.45 = 455,353.22 : x
  2. Step 2: Convert to fraction form
    817,929.32/1,128,720.45 = 455,353.22/x
  3. Step 3: Cross multiply
    817,929.32x = 1,128,720.45 × 455,353.22
  4. Step 4: Simplify right side
    817,929.32x = 513,966,485,743.75
  5. Step 5: Solve for x
    x = 513,966,485,743.75/817,929.32
  6. Step 6: Final answer
    x = 628,375.19

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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.