Home / 390,182.27-538,443.32-218,095.43

Finding the Fourth Proportional to 390,182.27, 538,443.32 and 218,095.43

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Solution

The fourth proportional to 390,182.27, 538,443.32 and 218,095.43 is: 300,967.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,182.27 : 538,443.32 = 218,095.43 : x
  2. Step 2: Convert to fraction form
    390,182.27/538,443.32 = 218,095.43/x
  3. Step 3: Cross multiply
    390,182.27x = 538,443.32 × 218,095.43
  4. Step 4: Simplify right side
    390,182.27x = 117,432,023,623.33
  5. Step 5: Solve for x
    x = 117,432,023,623.33/390,182.27
  6. Step 6: Final answer
    x = 300,967.10

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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.