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Finding the Fourth Proportional to 878,267.75, 1,212,010.31 and 475,859.75

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Solution

The fourth proportional to 878,267.75, 1,212,010.31 and 475,859.75 is: 656,686.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,267.75 : 1,212,010.31 = 475,859.75 : x
  2. Step 2: Convert to fraction form
    878,267.75/1,212,010.31 = 475,859.75/x
  3. Step 3: Cross multiply
    878,267.75x = 1,212,010.31 × 475,859.75
  4. Step 4: Simplify right side
    878,267.75x = 576,746,920,734.72
  5. Step 5: Solve for x
    x = 576,746,920,734.72/878,267.75
  6. Step 6: Final answer
    x = 656,686.89

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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.