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Finding the Fourth Proportional to 307,578.72, 424,439.28 and 171,632.64

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Solution

The fourth proportional to 307,578.72, 424,439.28 and 171,632.64 is: 236,842.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,578.72 : 424,439.28 = 171,632.64 : x
  2. Step 2: Convert to fraction form
    307,578.72/424,439.28 = 171,632.64/x
  3. Step 3: Cross multiply
    307,578.72x = 424,439.28 × 171,632.64
  4. Step 4: Simplify right side
    307,578.72x = 72,847,634,146.10
  5. Step 5: Solve for x
    x = 72,847,634,146.10/307,578.72
  6. Step 6: Final answer
    x = 236,842.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.