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Finding the Fourth Proportional to 443,688.63, 665,266.55 and 203,501.65

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Solution

The fourth proportional to 443,688.63, 665,266.55 and 203,501.65 is: 305,130.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,688.63 : 665,266.55 = 203,501.65 : x
  2. Step 2: Convert to fraction form
    443,688.63/665,266.55 = 203,501.65/x
  3. Step 3: Cross multiply
    443,688.63x = 665,266.55 × 203,501.65
  4. Step 4: Simplify right side
    443,688.63x = 135,382,840,614.81
  5. Step 5: Solve for x
    x = 135,382,840,614.81/443,688.63
  6. Step 6: Final answer
    x = 305,130.29

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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.