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Finding the Fourth Proportional to 554,856.19, 765,723.27 and 313,147.21

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Solution

The fourth proportional to 554,856.19, 765,723.27 and 313,147.21 is: 432,155.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,856.19 : 765,723.27 = 313,147.21 : x
  2. Step 2: Convert to fraction form
    554,856.19/765,723.27 = 313,147.21/x
  3. Step 3: Cross multiply
    554,856.19x = 765,723.27 × 313,147.21
  4. Step 4: Simplify right side
    554,856.19x = 239,784,105,632.58
  5. Step 5: Solve for x
    x = 239,784,105,632.58/554,856.19
  6. Step 6: Final answer
    x = 432,155.41

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Double scale
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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.