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Finding the Fourth Proportional to 420,153.60, 579,860.98 and 238,892.68

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Solution

The fourth proportional to 420,153.60, 579,860.98 and 238,892.68 is: 329,699.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,153.60 : 579,860.98 = 238,892.68 : x
  2. Step 2: Convert to fraction form
    420,153.60/579,860.98 = 238,892.68/x
  3. Step 3: Cross multiply
    420,153.60x = 579,860.98 × 238,892.68
  4. Step 4: Simplify right side
    420,153.60x = 138,524,543,539.63
  5. Step 5: Solve for x
    x = 138,524,543,539.63/420,153.60
  6. Step 6: Final answer
    x = 329,699.77

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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.