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Finding the Fourth Proportional to 551,081.65, 760,450.69 and 309,317.51

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Solution

The fourth proportional to 551,081.65, 760,450.69 and 309,317.51 is: 426,834.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,081.65 : 760,450.69 = 309,317.51 : x
  2. Step 2: Convert to fraction form
    551,081.65/760,450.69 = 309,317.51/x
  3. Step 3: Cross multiply
    551,081.65x = 760,450.69 × 309,317.51
  4. Step 4: Simplify right side
    551,081.65x = 235,220,713,908.58
  5. Step 5: Solve for x
    x = 235,220,713,908.58/551,081.65
  6. Step 6: Final answer
    x = 426,834.60

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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.