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Finding the Fourth Proportional to 399,457.69, 551,268.01 and 229,691.81

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Solution

The fourth proportional to 399,457.69, 551,268.01 and 229,691.81 is: 316,984.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,457.69 : 551,268.01 = 229,691.81 : x
  2. Step 2: Convert to fraction form
    399,457.69/551,268.01 = 229,691.81/x
  3. Step 3: Cross multiply
    399,457.69x = 551,268.01 × 229,691.81
  4. Step 4: Simplify right side
    399,457.69x = 126,621,748,677.28
  5. Step 5: Solve for x
    x = 126,621,748,677.28/399,457.69
  6. Step 6: Final answer
    x = 316,984.13

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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.