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Finding the Fourth Proportional to 627,315.20, 865,698.84 and 340,835.12

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Solution

The fourth proportional to 627,315.20, 865,698.84 and 340,835.12 is: 470,354.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,315.20 : 865,698.84 = 340,835.12 : x
  2. Step 2: Convert to fraction form
    627,315.20/865,698.84 = 340,835.12/x
  3. Step 3: Cross multiply
    627,315.20x = 865,698.84 × 340,835.12
  4. Step 4: Simplify right side
    627,315.20x = 295,060,568,015.26
  5. Step 5: Solve for x
    x = 295,060,568,015.26/627,315.20
  6. Step 6: Final answer
    x = 470,354.57

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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.