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Finding the Fourth Proportional to 470,339.56, 649,080.30 and 255,479.56

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Solution

The fourth proportional to 470,339.56, 649,080.30 and 255,479.56 is: 352,568.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,339.56 : 649,080.30 = 255,479.56 : x
  2. Step 2: Convert to fraction form
    470,339.56/649,080.30 = 255,479.56/x
  3. Step 3: Cross multiply
    470,339.56x = 649,080.30 × 255,479.56
  4. Step 4: Simplify right side
    470,339.56x = 165,826,749,448.67
  5. Step 5: Solve for x
    x = 165,826,749,448.67/470,339.56
  6. Step 6: Final answer
    x = 352,568.15

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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.