Home / 817,814.40-1,226,721.60-256,905.60

Finding the Fourth Proportional to 817,814.40, 1,226,721.60 and 256,905.60

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Solution

The fourth proportional to 817,814.40, 1,226,721.60 and 256,905.60 is: 385,358.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,814.40 : 1,226,721.60 = 256,905.60 : x
  2. Step 2: Convert to fraction form
    817,814.40/1,226,721.60 = 256,905.60/x
  3. Step 3: Cross multiply
    817,814.40x = 1,226,721.60 × 256,905.60
  4. Step 4: Simplify right side
    817,814.40x = 315,151,648,680.96
  5. Step 5: Solve for x
    x = 315,151,648,680.96/817,814.40
  6. Step 6: Final answer
    x = 385,358.40

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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.