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Finding the Fourth Proportional to 551,080.65, 760,449.31 and 309,316.51

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Solution

The fourth proportional to 551,080.65, 760,449.31 and 309,316.51 is: 426,833.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,080.65 : 760,449.31 = 309,316.51 : x
  2. Step 2: Convert to fraction form
    551,080.65/760,449.31 = 309,316.51/x
  3. Step 3: Cross multiply
    551,080.65x = 760,449.31 × 309,316.51
  4. Step 4: Simplify right side
    551,080.65x = 235,219,528,572.72
  5. Step 5: Solve for x
    x = 235,219,528,572.72/551,080.65
  6. Step 6: Final answer
    x = 426,833.22

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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.