Home / 817,721.80-1,128,321.30-455,136.24

Finding the Fourth Proportional to 817,721.80, 1,128,321.30 and 455,136.24

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Solution

The fourth proportional to 817,721.80, 1,128,321.30 and 455,136.24 is: 628,012.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,721.80 : 1,128,321.30 = 455,136.24 : x
  2. Step 2: Convert to fraction form
    817,721.80/1,128,321.30 = 455,136.24/x
  3. Step 3: Cross multiply
    817,721.80x = 1,128,321.30 × 455,136.24
  4. Step 4: Simplify right side
    817,721.80x = 513,539,913,993.91
  5. Step 5: Solve for x
    x = 513,539,913,993.91/817,721.80
  6. Step 6: Final answer
    x = 628,012.99

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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.