Home / 390,569.13-538,959.92-218,457.27

Finding the Fourth Proportional to 390,569.13, 538,959.92 and 218,457.27

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Solution

The fourth proportional to 390,569.13, 538,959.92 and 218,457.27 is: 301,456.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,569.13 : 538,959.92 = 218,457.27 : x
  2. Step 2: Convert to fraction form
    390,569.13/538,959.92 = 218,457.27/x
  3. Step 3: Cross multiply
    390,569.13x = 538,959.92 × 218,457.27
  4. Step 4: Simplify right side
    390,569.13x = 117,739,711,670.33
  5. Step 5: Solve for x
    x = 117,739,711,670.33/390,569.13
  6. Step 6: Final answer
    x = 301,456.78

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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.