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Finding the Fourth Proportional to 420,381.60, 590,008.80 and 420,381.60

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Solution

The fourth proportional to 420,381.60, 590,008.80 and 420,381.60 is: 590,008.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,381.60 : 590,008.80 = 420,381.60 : x
  2. Step 2: Convert to fraction form
    420,381.60/590,008.80 = 420,381.60/x
  3. Step 3: Cross multiply
    420,381.60x = 590,008.80 × 420,381.60
  4. Step 4: Simplify right side
    420,381.60x = 248,028,843,358.08
  5. Step 5: Solve for x
    x = 248,028,843,358.08/420,381.60
  6. Step 6: Final answer
    x = 590,008.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.