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Finding the Fourth Proportional to 420,152.60, 579,859.60 and 238,891.68

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Solution

The fourth proportional to 420,152.60, 579,859.60 and 238,891.68 is: 329,698.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,152.60 : 579,859.60 = 238,891.68 : x
  2. Step 2: Convert to fraction form
    420,152.60/579,859.60 = 238,891.68/x
  3. Step 3: Cross multiply
    420,152.60x = 579,859.60 × 238,891.68
  4. Step 4: Simplify right side
    420,152.60x = 138,523,634,008.13
  5. Step 5: Solve for x
    x = 138,523,634,008.13/420,152.60
  6. Step 6: Final answer
    x = 329,698.39

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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.