Home / 817,739.30-1,128,480.28-455,155.38

Finding the Fourth Proportional to 817,739.30, 1,128,480.28 and 455,155.38

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Solution

The fourth proportional to 817,739.30, 1,128,480.28 and 455,155.38 is: 628,114.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,739.30 : 1,128,480.28 = 455,155.38 : x
  2. Step 2: Convert to fraction form
    817,739.30/1,128,480.28 = 455,155.38/x
  3. Step 3: Cross multiply
    817,739.30x = 1,128,480.28 × 455,155.38
  4. Step 4: Simplify right side
    817,739.30x = 513,633,869,528.02
  5. Step 5: Solve for x
    x = 513,633,869,528.02/817,739.30
  6. Step 6: Final answer
    x = 628,114.45

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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.