Home / 817,720.80-1,128,319.92-455,135.24

Finding the Fourth Proportional to 817,720.80, 1,128,319.92 and 455,135.24

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Solution

The fourth proportional to 817,720.80, 1,128,319.92 and 455,135.24 is: 628,011.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,720.80 : 1,128,319.92 = 455,135.24 : x
  2. Step 2: Convert to fraction form
    817,720.80/1,128,319.92 = 455,135.24/x
  3. Step 3: Cross multiply
    817,720.80x = 1,128,319.92 × 455,135.24
  4. Step 4: Simplify right side
    817,720.80x = 513,538,157,585.98
  5. Step 5: Solve for x
    x = 513,538,157,585.98/817,720.80
  6. Step 6: Final answer
    x = 628,011.61

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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.