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Finding the Fourth Proportional to 420,958.60, 580,750.83 and 310,841.10

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Solution

The fourth proportional to 420,958.60, 580,750.83 and 310,841.10 is: 428,833.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,958.60 : 580,750.83 = 310,841.10 : x
  2. Step 2: Convert to fraction form
    420,958.60/580,750.83 = 310,841.10/x
  3. Step 3: Cross multiply
    420,958.60x = 580,750.83 × 310,841.10
  4. Step 4: Simplify right side
    420,958.60x = 180,521,226,823.11
  5. Step 5: Solve for x
    x = 180,521,226,823.11/420,958.60
  6. Step 6: Final answer
    x = 428,833.69

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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.