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Finding the Fourth Proportional to 485,716.80, 670,292.16 and 270,870.51

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Solution

The fourth proportional to 485,716.80, 670,292.16 and 270,870.51 is: 373,802.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,716.80 : 670,292.16 = 270,870.51 : x
  2. Step 2: Convert to fraction form
    485,716.80/670,292.16 = 270,870.51/x
  3. Step 3: Cross multiply
    485,716.80x = 670,292.16 × 270,870.51
  4. Step 4: Simplify right side
    485,716.80x = 181,562,379,228.20
  5. Step 5: Solve for x
    x = 181,562,379,228.20/485,716.80
  6. Step 6: Final answer
    x = 373,802.96

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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.