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Finding the Fourth Proportional to 420,595.66, 630,889.98 and 105,050.44

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Solution

The fourth proportional to 420,595.66, 630,889.98 and 105,050.44 is: 157,574.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,595.66 : 630,889.98 = 105,050.44 : x
  2. Step 2: Convert to fraction form
    420,595.66/630,889.98 = 105,050.44/x
  3. Step 3: Cross multiply
    420,595.66x = 630,889.98 × 105,050.44
  4. Step 4: Simplify right side
    420,595.66x = 66,275,269,990.59
  5. Step 5: Solve for x
    x = 66,275,269,990.59/420,595.66
  6. Step 6: Final answer
    x = 157,574.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.