Home / 390,664.17-539,143.29-218,598.48

Finding the Fourth Proportional to 390,664.17, 539,143.29 and 218,598.48

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Solution

The fourth proportional to 390,664.17, 539,143.29 and 218,598.48 is: 301,680.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,664.17 : 539,143.29 = 218,598.48 : x
  2. Step 2: Convert to fraction form
    390,664.17/539,143.29 = 218,598.48/x
  3. Step 3: Cross multiply
    390,664.17x = 539,143.29 × 218,598.48
  4. Step 4: Simplify right side
    390,664.17x = 117,855,903,696.20
  5. Step 5: Solve for x
    x = 117,855,903,696.20/390,664.17
  6. Step 6: Final answer
    x = 301,680.86

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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.