Home / 817,131.36-1,225,697.28-256,209.60

Finding the Fourth Proportional to 817,131.36, 1,225,697.28 and 256,209.60

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Solution

The fourth proportional to 817,131.36, 1,225,697.28 and 256,209.60 is: 384,314.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,131.36 : 1,225,697.28 = 256,209.60 : x
  2. Step 2: Convert to fraction form
    817,131.36/1,225,697.28 = 256,209.60/x
  3. Step 3: Cross multiply
    817,131.36x = 1,225,697.28 × 256,209.60
  4. Step 4: Simplify right side
    817,131.36x = 314,035,409,829.89
  5. Step 5: Solve for x
    x = 314,035,409,829.89/817,131.36
  6. Step 6: Final answer
    x = 384,314.48

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.