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Finding the Fourth Proportional to 420,403.57, 630,826.79 and 243,035.13

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Solution

The fourth proportional to 420,403.57, 630,826.79 and 243,035.13 is: 364,680.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,403.57 : 630,826.79 = 243,035.13 : x
  2. Step 2: Convert to fraction form
    420,403.57/630,826.79 = 243,035.13/x
  3. Step 3: Cross multiply
    420,403.57x = 630,826.79 × 243,035.13
  4. Step 4: Simplify right side
    420,403.57x = 153,313,072,065.56
  5. Step 5: Solve for x
    x = 153,313,072,065.56/420,403.57
  6. Step 6: Final answer
    x = 364,680.71

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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.