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Finding the Fourth Proportional to 310,299.48, 465,439.92 and 85,673.64

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Solution

The fourth proportional to 310,299.48, 465,439.92 and 85,673.64 is: 128,507.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,299.48 : 465,439.92 = 85,673.64 : x
  2. Step 2: Convert to fraction form
    310,299.48/465,439.92 = 85,673.64/x
  3. Step 3: Cross multiply
    310,299.48x = 465,439.92 × 85,673.64
  4. Step 4: Simplify right side
    310,299.48x = 39,875,932,147.71
  5. Step 5: Solve for x
    x = 39,875,932,147.71/310,299.48
  6. Step 6: Final answer
    x = 128,507.89

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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.