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Finding the Fourth Proportional to 420,725.70, 630,586.62 and 242,856.90

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Solution

The fourth proportional to 420,725.70, 630,586.62 and 242,856.90 is: 363,995.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,725.70 : 630,586.62 = 242,856.90 : x
  2. Step 2: Convert to fraction form
    420,725.70/630,586.62 = 242,856.90/x
  3. Step 3: Cross multiply
    420,725.70x = 630,586.62 × 242,856.90
  4. Step 4: Simplify right side
    420,725.70x = 153,142,311,714.68
  5. Step 5: Solve for x
    x = 153,142,311,714.68/420,725.70
  6. Step 6: Final answer
    x = 363,995.62

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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.