Home / 390,514.41-538,895.16-220,752.18

Finding the Fourth Proportional to 390,514.41, 538,895.16 and 220,752.18

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Solution

The fourth proportional to 390,514.41, 538,895.16 and 220,752.18 is: 304,629.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,514.41 : 538,895.16 = 220,752.18 : x
  2. Step 2: Convert to fraction form
    390,514.41/538,895.16 = 220,752.18/x
  3. Step 3: Cross multiply
    390,514.41x = 538,895.16 × 220,752.18
  4. Step 4: Simplify right side
    390,514.41x = 118,962,281,361.45
  5. Step 5: Solve for x
    x = 118,962,281,361.45/390,514.41
  6. Step 6: Final answer
    x = 304,629.68

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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.