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Finding the Fourth Proportional to 420,197.58, 579,859.56 and 238,929.30

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Solution

The fourth proportional to 420,197.58, 579,859.56 and 238,929.30 is: 329,714.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,197.58 : 579,859.56 = 238,929.30 : x
  2. Step 2: Convert to fraction form
    420,197.58/579,859.56 = 238,929.30/x
  3. Step 3: Cross multiply
    420,197.58x = 579,859.56 × 238,929.30
  4. Step 4: Simplify right side
    420,197.58x = 138,545,438,769.11
  5. Step 5: Solve for x
    x = 138,545,438,769.11/420,197.58
  6. Step 6: Final answer
    x = 329,714.98

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1.5x scale

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.