Home / 390,311.18-538,622.43-220,541.66

Finding the Fourth Proportional to 390,311.18, 538,622.43 and 220,541.66

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Solution

The fourth proportional to 390,311.18, 538,622.43 and 220,541.66 is: 304,343.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,311.18 : 538,622.43 = 220,541.66 : x
  2. Step 2: Convert to fraction form
    390,311.18/538,622.43 = 220,541.66/x
  3. Step 3: Cross multiply
    390,311.18x = 538,622.43 × 220,541.66
  4. Step 4: Simplify right side
    390,311.18x = 118,788,684,825.43
  5. Step 5: Solve for x
    x = 118,788,684,825.43/390,311.18
  6. Step 6: Final answer
    x = 304,343.54

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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.